I kinda thought the same thing when i saw it it'd be a cheap way for everyone to play multiplayer, and with up to 32 players at a time, we'd be able to have a fun stream for the live feed if anyone had a tuner card set up for it.
the one and only dreamcast game i really really really want.... is skies of arcadia. the gamecube version was ok, and i'd love a continuation, but i want the original almost as much as a legend of dragoon remake.