Fairly important. For the core gamers at least.
People know next gen exclusive titles are coming, thats not even a question. But in the past the you would wait until they actually arrived or risk having your new system collecting dust. Instead I can play superior version of ps3/360 titles on the new systems. Depending on the price they launch at, I'd have no reason to wait instead of picking up a ps4/720 this year. I've never bought a console at launch because of the lack of games (exclusive or not), so now that is not an issue I know I'll be picking up a system this fall.
Also, I'd find it difficult purchasing a game I really wanted to play when I know that there is a superior version out there.
For the majority of casual gamers it will not make a difference, but they are unlikely to be early adopters anyway. Some of them will be swayed if PS4 COD and Fifa looks noticeably better.







