Yeah, TimeWarner's DVR has come along quite a ways in terms of functionality. I haven't played with it all that much, but it does seem to mirror the TiVo Season Pass fairly well (ie. 'First-Run Only' vs 'First-Run & Repeats', 'Keep At Most [x] episodes,' etc).
What honestly makes TiVo standout to me is that you can query data (ie. Wishlists) so, if you're a nature nut, you can TiVo all documentaries which feature rain forests, for example. You can also wishlist actors & directors (ie. 'Movies & Gable, Clark').
Yes, I know most legit film fans go the DVD route but I'm pulling examples off the TiVo that my mom uses - still the greatest Mother's Day present she ever got

according to her. (No, I haven't brought her a Mac yet

)