I'd have to say that this is perhaps a bad idea. TiVO and Replay are losing ground in the market because of Dish, DirectTV, and Cable companies now having similar offerings. As well, there is a slew of new DVD Burners with hard drives out there for less than TiVo, AND they don't require a subscription. Some basic ones are like VHS decks and leave it up to you and your TV guide to program. Some utilitze VCR Plus to make it simpler. But some utilize free online services like tvguide.com - which has searches for actors and such. It won't be long until the subscription method is gone and the ad method fills the void.
I don't see Apple jumping in on the tail end of a dissolving marked. If they're jumping in, they've got their own idea up their sleeve, and buying TiVO would give them an instant user base for their new style service, plus essentially eliminate their only real competition.
Show of hands, who bought the lifetime subscription for their TiVo box?