There may be the case for people moving to public transport in the next few ways not due to the attractiveness of trains/buses etc but due to the price of running a car going even higher. I don't see petrol prices going below the £1 mark ever again and if plans for charging people to park at work are implemented we might see higher demand for public transport.
For journeys to work maybe, in London (where driving's totally unattractive) or PTE areas (where public transport isn't [yet] scandalously expensive). For the sort of journey I'm talking about it'll never happen en masse. It's not just economics, it's cultural. The TOCs and BR before them have simply accepted the dominance of the car for at least a generation and now it'll be difficult to fight back even if parity of pricing existed because people are just so conditioned to use the car for everything.
People also tend to cost their car journeys only on the marginal cost of the fuel consumed, and not on the wear and tear. This may be wrong, but it'll be hard to crack. Company car drivers (and we are legion) can think in this way quite legitimately.