I don't mind it's a console-only game in the least. They just released Warcraft III, and Diablo II is still quite new. Did you really expect another RTS for the PC soon?
I'm sure Starcraft2 is coming, but probably not for somewhere around two years (though I'm sure we'll hear about it sooner than that...).
The way I see it, this is just Blizzard's attempt to break into the more lucrative console market. In a way, I do hope they fail and go all-PC