Blu-Ray wins vs. HD-DVD - the 2-in-one feature of movie watching and game playing on one device was what caused me to go and get a PS3. Seems that this may have worked in favor of Blu-Ray killing off HD-DVD! Now this is helping PS3 sales over Xbox.
There was another good side-effect - PS2 games work on my PS3 - great, since there are not a whole lot of great titles for PS3 yet :-)
Convergence and simplicity .... games on the iPhone which is also a Wiimote :-) One device fits all...pockets.