Quickdraw McGraw on 15 July 2008
Eh, business is business. And when one company has the pockets and influence of Microsoft these things end up happening.
At least PS3 owners still get the game (And probably the definitive version), so it's not as bad as it was for N64 owners back in the day, although it's still quite the unexpected announcement.
Hopefully the rest of E3 proves to be just as surprising.
