Well, by region:
1 - Japan - Nope. Unless the Japanese go absolutely nuts over Natal then the 360 is done there now.
2 - Others - Yup. On current form PS3 should comfortably move away from 360, but MS would be mad to just sit and take that, so I expect changes
3 - US - Oh my word yes. On current trends 360 is about to get a bloody nose in its home turf. I definitely don't expect MS to take that sitting down so changes and much fighting in the mud for sure.
Try to be reasonable... its easier than you think...







