The XBox looks like it would go the way of HDDVD

[DOATS1]

lets see:
360 core
360 arcade
360premium
" with hdmi
360 elite

ps3 20gb
" 40gb
" 60gb
" 80gb

and also realise that each region has no more than 2 sku's on sale at the moment for ps3. 360 has all 3 sku's in each region.