Comcast TiVo and Original TiVo Remotes - Originally uploaded on flickr by stevegarfield.
The Comcast TiVo remote adds buttons. I don't like more buttons.
New buttons include:
On Demand
A
B
C
D
STOP
"The A, B, C, D buttons let you access shortcuts and various features, depending on where you are."
That goes again the original Apple developer guidelines from 1984. It makes the functions modal, when the preferred way is non-modal.
In fact, it would have been better if no additional buttons were added at all, and these functions were put in on screen menus.