Not to add fule to the fire, but....
1) With the Removable batteries on the XBOX360 controller... I can use:
Their rechargeable pack, Standard AA batteries, or Rechargeable AA batteries.
So if I forget to pull the USB cable out, and plug that controller in...
If the batteries die... I don't have to sit next to the console (which is in my AV center)...I can just plop two AA batteries in there, and continue to play... then when I an done for the night... I can put the rechargeable pack back into controller and charge it over night.
And we are not talking mega dollars here for AA batteries... heck a 48 pack at Home Depot is like $7
If the rechargeable battery pack goes bad.... which they do... maybe not for you, but it is pretty common knowledge that eventualy a rechargeable battery of any type will at some point go bad. Depends SIGNIFICANTLY on your usage and recharge habits... but it does happen.
In that case..
XBOX360 -> buy a new recharge pack, use AA's, or use AA Recharges.
PS3 -> Send it in for repair, for what $ and time... or purchase an entirely new controller
2) Blue Tooth... resync... All depends on how easy it is to drop the unit into standby vs power off. and how much of a capacitor that PS3 has in it's power supply to handle quick brown outs (which happen all times of the day).
Also... to me depends on how this USB connects (front/back/side), and the easy of storing the thing... oh wait.. you need it for each of your controllers...
So from a "looks" point of view... If I had 4 PS3 controllers... I would need 4 USB cables on the unit? charging them?
Now if the PS3 is to be taken seriously as a BluRay "AV" component...
Looks have to take a serious consideration.
There is one thing I love about my XBOX360.
Control #1 sits right on top of the unit. When I want to play a quick game... I pick it up... hit the button and everything wakes up. Controlers #2, #3, #4 are all down in the cabinet, and the recharging dock is also in there.
From the pictures I have seen of PS3, that curved top,is not going to give me that option just to sit the controller there when the unit is not in use...
And from reading this about the USB cable, ect...
I really hope Sony wasn't dumb enough to not allow the controller to be charged from a standard USB hub... or where they "smart" enough to design and eventually sell some sort of "controller" recharge base.