So........
Please explain how an XBOX can duplicate or surpass the Blu Ray/audio of a PS3?
Since Sony is more interested in keeping their patented player exclusive to their own console and brands, or licensing it to those that aren't a threat to them, rather than opening it up to be marketed and utilized as an additional accessory for use by everyone in a very large and established console market (ego before profit?)... take a USB memory stick, transfer the media from your computer to it, take the stick and plug it into your XBox and play it.
You could also hook your XBox up to network with your computer, directly transfer it to your XBox's hard drive over the network, but you could also just hook your TV up to your computer and just play it from your computer. This also obsoletes PS3's need too, you can play higher-defintion media straigth from your computer to your TV without any need for a console (or did Sony not tell you guys this stuff like XBox and Microsoft does? because either way to Microsoft in those cases, you're likely to be using one of their products to get you your greatest viewing pleasure. all you'll hear from Sony is "just use ours, ours is better, don't think about the alternatives, there is none to our exclusively patented product, just use ours, ours is better,")