From what I see so far the new Xbox is good but not amazing, I think that the new Playstation will be better, BUT!
since there is the multiplatform thingy, since every software house won't start to build a game from scratch jus to meet the play station advanced hardware, what will happen is what happen with the current Gen, the Xbox games look very similar to the playstaion since nobody have power to publish game dedicated to the playstaion or Xbox, so I guess although playstaion will be much better there won't be much difference,
although if I were you I would wait to see what they have to offer, they are very quiet and when they are quiet they are most dangerous...