is it worth it to get one of these things now? or should I just wait until the next gen consoles come out?
IMHO, that's a VERY broad question.
Personally, I wouldn't compare this (or any other PC) to a console regardless of it's size & form factor.
It all comes down to choice. This is a great machine but you can make a better machine for less money (IF you know how). I think this is a great device. Yes, a bit expensive, but I guess people who don't know how to build their own machine of this type "pay for the comfort".
On the other hand, next-gen consoles aren't even annouunced and every info released so far is just rumors & speculation. Who knows what'll we get in the end, and when (end 2013. , early 2014.?).
If you want to jump to PC gaming, buy this. It's a great piece of hardware. If you have "PC building skillz" (hehe), then build something of your own (for less money).
If you don't have an X360/PS3 yet, buy one of those. They're still great machines with ton of great games.
Regards.
edit: I'm a MEMBER now! yay! \o/