It could be a great feature. It remains to be seen how well the system works. Primarily, the latency and stability of the connection. If it's anything like Remote Play on PS4-Vita, this feature will rely heavily on the quality of your internet connection.
Personally, I think the 1-hour time limit is perfectly reasonable. It prevents your from just AFK-ing your PS4 and letting your friend play all day. I can't think of any game that doesn't give at least a few opportunities within an hour to reset the timer.
Also, this is my first post in this forum! Some crazy rules prevent me from posting a new thread until I have 50 posts. So I can't properly introduce myself until then. (What's the point of the "introduce yourself" category in the forums? lol)
I look forward to discussing gaming and sales in the future!
"Never argue with stupid people. They will drag you down to their level and then beat you with experience."
-Samuel Clemens