honestly now ... how close will the gap get?

[shogia]

Against probably my better judgment I'll throw out a prediction.
PS3 catches 360 holiday 2011 (if we're picking random weeks, 2nd week of December)
The software gap (also where gaming companies tend to make money) on the other hand I think will remain firmly on the side of the 360, maybe shrinking to 40m. I don't see the current attach rates changing immensely and the current gap of 100m+ is sizable in proportion to the change I'd expect to see in hardware. That said a change in the price of games due to digital distribution could drastically change what software numbers mean in the future.