I think that they wanted to have a generic map system that you could use to run 4e combat like a chess game with multiple players, monsters and terrain. It would basically allow for better on-line play. IF the idea was to have everyone sitting around with their laptop keeping track of their character sheet, during the game then it would rock. IF they truly wanted on-line gaming, then World of Warcraft has already won.
They were going to also have an on-line character generator and I hope that it is still in the works. The CG in itself would win over a few holdouts on 4e, and if you could have a tool that helped the DM run a complex monster then gameplay would be enhanced.
I hope they just focus on making tools for the pen and paper game. Miniatures and game tiles are a step in the right direction.