"[It\'s gonna be Sony vs Nintendo...]"
That also depends how much space is taken up with actual content as opposed to giant Pokemon creatures.
You might also notice that the Microsoft booth is surrounded by almost all of the third parties, so whatever X-Box stuff those guys show will be like an extension of Microsoft\'s booth. Sony and Nintendo are pretty isolated, so these third party games could take a back seat.
Of course, floor space only matters for show goers, anyway. It all becomes words and pictures for the rest of us which will give us a true sense of who had the best showing...
-Eik