So does Digest mode mean you can choose to watch the game if you want? Or can you just go back and play stuff you've already beaten? You know when a game becomes a chore but you still like the story this would be very useful. It's also good if you're stuck on a particular part and want to just skip it.
The idea sounds like blasphemy because if one overused the feature it would kill the whole point of playing a videogame in the first place. But I won't deny that this would give videogames massive mainstream appeal. It removes any need for skill but at the same time doesn't force the game to be easy. It makes games optionally passive and passive entertainment is true mainstream. It would also kill backlog for hardcore gamers. If you're tired of playing the damn game then sit back and watch it.

I would fear though that watching the game would become so popular that devoplers would focus more on that and not put as much attention to balance the difficulty. This part's too hard? Don't need to tweak it because they can just skip it. Who cares if we really make this gameplay fun when 90% of those who buy it will just watch the damn game? Ever encounter parts in games were it's clear they didn't bother to make the solution logical because they hope you'll buy the strategy guide at best and figure at worst you'll go on GameFaqs? Imagine that 100 times worse.
I would use "digest mode" for RPGs though. I just don't find the gameplay all that fun so I would do the fun stuff like exploring and then let the battles play themselves.