the ps3 may be gettin blu-ray but the xbox360 is gettin hd-dvd, yes not straight away but the technology needs developing!!! I beleive it all comes down to the actual experience u get when u play em, something which we cant do untill they come out!! take the xbox for example i love the fast loading and the graphics but it doesn't have the pedigree that the ps2 has!!! Both systems (xbox360 and ps3)are very powerful, personally i think the xbox 360 is more powerful than the ps3, but what u have to remeber is that the developers utilize everything a console has so the ps3 will probably have games that look just as gud as the xbox!!!
Overall lets wait and see!!!
btw, i praise microsoft and id software for the way they made doom 3 look on a geforce 3!!! Thats some skills they got there!! i cant wait too see wat the xbox 360 will do!