I really don't get the point of the one hour limit. As I understand it there is no Sony servers involved here so Sony doesn't need to limit resource use. If you want to load up The Last of Us or something then pass control of your PS4 to your remote friend for the weekend what does Sony care? That means you can't use your PS4, you're sucking down your bandwidth streaming the game video to your friend (which is probably 720p instead of 1080p), and your friend is stuck playing just that one game of yours with saves that are on your profile. That seems like enough to limit abuse already without having to cap it at an hour. If your friend wants to actually have the trophies on their profile, play whenever they want, etc. they still need to buy the game. I'm not saying I think the feature is bad, it's still pretty cool and I don't think the competition even offers that much but the hour limit just seems arbitrary and unnecessary to me.
Because it's based around both of you playing together, even if its a SP game you can still spectate your friend playing. It is a form of DRM-lite, they want your friend to be there (the one that owns the game). It's probably the best we're going to see from digital sharing, sure with discs you can just give your friend the game, but publishers and developers are never going to sign onto this kind of sharing without some sort of clause.
At least at the end of the hour you can just reauthorize and you can do that as many times as you want - Putting a limit on that would be crappy DRM. This is a fair compromise.