It's mainly the 30 quality games that PS4 has, but XB1 will never get. If you ignore the mountains of shovelware, and just look at quality games the XB1 is severely lacking. But if you include the shovelware, then yes they have 95% the same library.
Most of the XB1's exclusives like Forza, Gears, and Halo require an online connection to enjoy the bulk of the game. The same isn't true for Horizon, GoW, Uncharted, etc. Sony's exclusives still focus on single player.
Not even close to being true. Exclusives this gen make up for barely anything (in quantity), even if you only count quality titles.
Bet with Intrinsic:
The Switch will outsell 3DS (based on VGchartz numbers), according to me, while Intrinsic thinks the opposite will hold true. One month avatar control for the loser's avatar.