I'm probably not getting a PS4 at launch with how many games that have been released I'm waiting to find cheap and how many games that are releasing this year that I'm going to wait until they get cheap.
I'm interested in Infamous Second Son and Watch Dogs though. While Watch Dogs is also on current gen consoles, I'll get the PS4 version. The game is an open world title that looks better than Uncharted 3, so you know that's not the version we're going to see on current consoles. Plus I'm sure there's going to be a lot of framerate issues, screen tearing, and texture pop in on current consoles so that right there is also a deterrent.
After the PS4 is released shouldn't be too long before we see somewhere offering a $50 discount or a $50 gift card along with the PS4 and somewhere else will be offering buy two get one free. I'll just get a PS4 then. Hopefully by that time the games have dropped in price as well. Games have been dropping in price within months after release, sometimes a month. There's no reason to get games you're interested in in day one anymore. Not unless you have nothing else to play.