I thoroughly enjoy my 360, DS, and Wii, but I'm not a huge believer that Microsoft thinks very deeply about things. That said, and assuming VP is a fairly big hit on the DS (they should be marketing the hell out of it), MS would be in a good position to improve their image in Japan if they executed well. Certainly connectivity between the DS VP and VP2 on the 360 would be huge if the interaction was more than trivial. I won't hold my breath, however.
I guess we'll have to see how the Japanese react to the DS title first and then see where MS goes with it. VP is a great game and if the Japanese give it a chance (it is a Rare game, afterall), it could do very, very well...
I hate trolls.
Systems I currently own: 360, PS3, Wii, DS Lite (2)
Systems I've owned: PS2, PS1, Dreamcast, Saturn, 3DO, Genesis, Gamecube, N64, SNES, NES, GBA, GB, C64, Amiga, Atari 2600 and 5200, Sega Game Gear, Vectrex, Intellivision, Pong. Yes, Pong.