Considering I have a new baby dropping in about 3 months, having the money for a new console at launch just isn't happening.
However, assuming I DID have the money (and assuming I wasn't ridiculously flushed with cash) I'm still not sure I would. £300 for the new console with a game or 2 would be my limit I think, but even so it would greatly depend on what the launch titles were, particularly, which ones were next gen only, as a lot of these titles are cross generation, so I can more than happily play them on my current box. If there aren't any new games that are next gen only that make me feel like I NEED to play them asap, then I won't be getting one immediately.
“It's a movie. If you are going to believe and be affected by an action film, you shouldn't go to see Pocahontas because you are going to think you are a Disney princess” Chloe Grace Moretz, what a legend.