I'm personally expecting PS4 and Xbox One games to be around the same as Wii U games, i.e. the big budget triple A titles will cost up to £44.99 RRP, while other games will be around a tenner less.
Of course, this is still an increase on the prices of the previous generation, which are already too high for my tastes. Unless a game is console exclusive I just buy the PC version; I have my system hooked up to a big 50" widescreen and there's a 360 gamepad plugged into it, so not only is the playing experience the same as if I were using a console, the graphics are better and I may well have the ability to use 3rd party mods.
If a game is an exclusive I either buy it second hand or wait a few months for the price to drop. I think the only exclusives I bought on the day of release were Uncharted 2 and 3, and in fact I'm waiting on news of an Uncharted 4 before I place my PS4 pre-order.