but if you see the recent trends, Canon was not really worried about nikon. Looked at the recent 30D launch. Like never change like that. No innovation, no nothing. Just happy with their leader position. As nikon also never introduce something really convincing. It is the other manufacturers like oly who is desperately trying to innovate with live view etc.
Ultimately is not about which camera is better but rather are they will to slash the price and makes it better for us consumers.
At least the Sony is uping the bar by introducing a DSLR that uses a similar sensor as the D200 at D70s price. This will force not just Nikon but also canon to at least make better products if not reduce the price.
Furthermore, if you notice that 2 out of 3 Carl Z new lens for Sony is FULL-FRAME. Sony makes their own sensors so I think they can develop a full frame sensor pretty easily and compete with canon 5D. Another price war

else nobody compete with canon 5D and full frame will always be so expensive.