You can't browse the net in the Xbox360. It's a matter of all-in-one.
PSN is as good as XBL, XBL looks more fancy, but you can do exactly the same thing on both Networks.
I would never browse the net on my 360 lol. My computer is right next to me.
However, I was talking about games on Xbox live. For example, the xbox live arcade always has great cheap games. Even in the summer XBLA is getting great games like splosion man, shadow complex, and trails HD. Not to mention castle crashers and Braid. There's some seriously good games aside from the 360's already strong line up.
Ps3 motion control isn't shit, it's quite good actually.
And the better of it is, that it isn't a overused feature in all PS3 games.
And yeah, blu-ray won't make you any difference if you have a small screen. But nowadays 5 in 7 families own a LCD/plasma television, not too big, not too small, to enjoy blue ray you'll just need a 1080dpi television.
The controller is good for me.. It's a matter of taste.
As for the utility of the internet browser, well, I'm writing on it right now lol. My PC is broken.
But yes, PC gaming owns the crap outta everything.
The ps3's motion controller has good 1/1 motion. I'm not really going to debate this thoroughly right now. I'll just speculate my thoughts since you brought it up.
My prediction would be a parallel to how this console war is going: the ps3's motion controller will have nicer tech, with less developer support and less games. Natal will come out with several games ready and it will probably have a wider audience (which leads to stronger developer support). Natal will probably be packaged just like the XBL headset so that it strongly penetrates the market.