I agree with the Kahuna on the button thing.
While there have been a lot of great suggestions in this thread, the number one item on my wish list is up-conversion from composite and S-Vid to Component. There are a few units out there that do this so we know it can be done.

If the A/V world will step into updatable software (a few high-ends have it), the only part of the mystery digital connector that has to be settled is the physical connector itself. If the software guess is wrong, it can be updated. Oh yeah; convert composite, S-Vid, and component to digital too once the digital question has been settled.

I don't want much do I?