I'd be more worried about the lack of backwards compatibility and the launch day line up of games. But I'm not getting a PS4 (at least) until the first slim model is announced.
At least for US residents there will be a backward compatibility mode: here in Italy, where crappy internet connections are the standard (and you pay a LOT for them, like 20€/per month), if they will implement Gaikai, I bet that it will be completely useless.
First time I heard about PS4, I really wanted it. But now....I will wait for a HUGE price drop.
Simply, for now, there are NO games I want to play at all.
I will play for sure Kingdom Hearts 3, and this is, at the moment, the unique PS4 game I'm looking for.
There is Metal Gear Solid 5, of course, but if it runs properly on PS3 (and watching the war scenario in Beyond Two Souls I think this is possible) I will take it for my current console.
Also, no backword compatibility for PS1 titles is a shame.I mean, you can implement it with zero resources if you want, it's not like the PS2 and PS3 games.