Wait a moment, why is this development sad? What's so bad about the developers deciding to make some money after working their asses out for free, year after year? It's not as if the new port will render us unable to able to play the game we all know and love!
What we have here is a new game, with different art assets and similar mechanics, targeting a different, completely proprietary platform. Why do current players feel they are somehow affected by this is beyond me. (Or have you actually forked your money to Microsoft for an Xbox? Sorry, but you don't get to gripe about the non-GPL license then).
Best of luck to them, I say.