Did this end up becoming a reality?
"Tivo's potentially killer functionality is on-demand content. Want last weeks's Shortland St? Simply download it. TVNZ have a huge back catalogue that they obviously believe offers a significant business model.
MySky has this capability but at present Sky aren't using it - they have yet to go down the internet connectivity path with their boxes and offer an on-demand backend and internet based scheduling. I'm sure their plans will be being ramped up now."