Certainly hopefult; but not, I think unrealistic. When First in Bristol (who have the advantage of being substantially sole operator) introduced their simpilified bus fare structure, average trips per person across the conurbation increased by 20 per year. An equivalent increase in Greater Manchester would likely see a franchised network home and dry.
It is not that long since the National Audit Office proposed that potential growth in tram use was being vastly overhyped; where it is now accepted that latent demand for trams from reluctant car users remained very strong. It just needed the right package of accessible services and fares. In my view the same will turn out to be true for buses; find a model of service that reluctant car users find attractive, and passsenger growth will follow.
https://www.nao.org.uk/wp-content/uploads/2004/04/0304518.pdf
I don't think it's quite as simple a correlation as that.
In Bristol, First have managed to increase passenger figures but there are some important caveats. The figure quoted by James Freeman was 17.6% - only 9% was as a consequence of the Fairer Fares restructure. Also, whilst that may be applied on a like for like basis, some of those routes will have abstracted patronage from competing or parallel Wessex services.
Manchester is indeed booming and on a like for like with Bristol, the comparison is valid. However, looking at Greater Manchester as a whole, I doubt that the level of economic activity is anywhere near Bristol (or the wider "Avon" area). In truth, Bristol and Manchester are vibrant and growing centres of industry in finance and professional services and are pretty comparable, but places like Yate, Bath, Portishead or Weston have a much higher level of economic activity than places like Bolton, Oldham or Ashton.
For instance, using the ONS's figures for JSA claimants, the comparisons are pretty stark:
Altrincham 2.3%
Ashton 5.2%
Bury 4%
Bolton 6%
Bolton West 3.4%
Cheadle 1.9%
Denton 4.6%
Leigh 4.6%
Manchester 5.6%
Manchester North 3.5%
Oldham 5.9%
Rochdale 6.1%
Compare that with CUBA areas:
Bath 2.0%
Bristol South 4.1%
Bristol 3.8%
Bristol North 3.3%
North Somerset 1.7%
NE Somerset 1.4%
South Glos 1.7%
The truth is that the JSA claimant rates are a pretty good indicator of the relative health of an area and the greater Bristol area is a lot more buoyant economically than GM. Note: have aggregated some areas for clarity but not so that they are statistically skewed! That economic activity is crucial in delivering increased revenues and is clearly more restricted in GM. And lest we not forget, First GM did reduce their fares in 2013 - the result was increased ridership as in Bristol but the increased revenue and profitability hasn't come and that is down to wider issues than just price elasticity.
Also, the fact is that the bus is the default public transport option in Bristol. Suburban rail is a relatively minor player. Not the case in Greater Manchester and indeed, the success of the tram is attributable not only in attracting previously car using individuals but also abstracting trade from the parallel bus services. Therefore, any uplift in bus patronage can't be through the cannibalisation of those other modes and I'd be surprised if that were achievable anyway given the time benefits and better image of those modes.
Moreover, the idea that you can repeat the trick with buses as with trams is not as simple as that. Now, I know that we on this board are atypical - we are all generally advocates of public transport in all its forms generally. The general public are less so and, sad to say, I know of plenty of people who will consider using the train or tram who would not countenance using a bus. It has an image problem though one that I think is unjust. Having travelled on the latest Stagecoach Gold vehicles in South Wales, I'd say that bus travel can be a positive and even luxurious experience. However, Phil Tonks excellent blog illustrates many of the existential issues that the bus industry has - some are self inflicted, some through poor management and dubious decisions, but some clearly impacted as the retail landscape changes and travelling patterns change.
However, I'll park the cynical, eeyoreness to one side. There are definitely areas in which bus travel can be improved and made a success - whilst I've not experienced Vantage (it's on my to do list), it does show the art of the possible. There are many opportunities in which to redress the balance and help the bus and I do hope that they focus on delivering those infrastructure improvements to enable the bus to work efficiently and perhaps adequately enforced traffic regulations might also help.