As someone close to an X1 purchase, I was a bit disappointed. There was a lack of new games that were appealing, only Halo Wars 2 on the AAA exclusive front. I think this is a consequence of MS announcing a lot of games too early. New gameplay trailers for Dark Souls III, Just Cause 3 and Homefront Revolution all looked good, but my third party interests are all on PS so I don't really count them, as they are meaningless to me when considering an X1 purchase.
The new stuff shown on games already announced was good though. Scalebound is definitely one of my most anticipated games for next year now, and Tomb Raider looked strong, even if it pales a bit in comparison to a reasonably similar franchise on another console. Crackdown 3 looked like it had potential, but they didn't exactly show very much. Quantum Break, looked promising, even though I thought they overdid it on the powers, hopefully that was just for demo purposes and are toned down in the final product. Forza 6 and Halo 5 looked great as expected, even though I didn't like how they presented the latter with all the e-sport nonsense.
Overall, I would give it 5/10. It had a lack of new interesting games or features, but there was still a lot to be excited about for the future. The rest of this year and 2016 look good on the exclusive front. My only disappointment in that regard is that it does look like 2016 is going to be another year with big focus on the holidays, with Scalebound, Halo Wars 2, Gears 4 and Forza whatever all coming late in the year. Only Quantum Break and Recore interest me for the first two thirds of the year. Recore is a worry as well, no gameplay with the game supposedly coming H1 next year is odd.