Sure, no reason to wait. The consoles have no major problems and the HDDs are upgradeable whenever you like.
The question you are asking is, how much will the console decrease in price between now and when some more games come out. I can't see it being an amount you are angered by, so there is no reason to dawdle.
Im working my way through Infamous now after not enjoying the first. Such a stunning game to look at, and rather fun to play. If you look for games to play, the PS4 has plenty.