Well maybe. But my main guess is they have a few big spring/summer titles to release and they just want to continue the hype train. So having this and GDC to keep it progressively going. My guess is for Sin and Punishment 2, Monster Hunter 3, Metroid:Other M, Last Story, and Xenoblade. Then at E3 they'll get into things like Galaxy 2, Zelda Wii, and other projects for late 2010 and 2011. Also some more hype for Heartgold/SoulSilver before it comes out.
I mean it is possible they just want to have something to one up X10, but I think it is more of a marketing strategy for the titles than anything.