Update, I signed up for trainer road and since it's raining here today and coming into winter will start with their FTP test on the trainer this afternoon.

Personally what I would like to see would be a video game (Kinect style), that would interface your riding onto a race course, allow for online play, etc. but using your regular trainer (not a compu trainer style). So even though there may be no feedback back or added resistance back to the bike it would be fun to have that level of interaction. I once took the Wii remote, stuck it in my sock and did a mini jogging course while riding on the trainer, that was interesting...