Dont buy a next gen system for the moment. Why?
1. Unproven hardware. Most not much better than a mid-range PC. Dont be a beta tester. Wait for the updates.
2. Launch Titles are poor
3. Good launch titles are also available on your existing console
4. No backward compatability to all those games you keep playing
5. All your friends are still on your old console
6. Consoles are a lot of cash. They may drop in price. Even the games are more expensive.
7. Not all of that extra functionality and Apps are there yet on the new systems.
Wait until March