I don't really think tivo has too much to worry about really. The one thing that it seems all the PVR zealots can agree on is that tivo has the most user friendly interface. As PVR's become mainstream and less of an early adopter market, they're going to need the UI more than anything. If you check out the tivo community boards, you'll find the only other online community i've found of people that buy extra expensive electronics and keep them in the closet just in case...

Matthew

PS: My next pay check is going for a tivo, can you tell?