If a game provides enough replay value to keep playing it for a couple of years after launch, I'm already happy. I really don't expect to continue playing Skyrim in the year 2030, for example.
I'm sure I will have already moved on to TES XIV or whatever the latest version will be, provided my rascal wheelchair and geriatric diapers don't get in the way of gaming on holograms or virtual reality goggles, etc., in my old age. Now get off my lawn!