3rd party games are a bigger factor than exclusives. They are just as good. They have tons of variety and come out much more often. You think PS4 could stomp Xbox without the third party heavy hitters? Ie: GTA, RDR, COD, BF, Ubisoft games and others?
1st party titles round out the library. But if you don’t have a 3rd party library to round out, you’ve become Nintendo.
We're not debating the quality of 3rd party vs exclusive, or whether a console could survive without 3rd party support though.
Basically he's asking XB1 -> XB1X vs XB1+PS4/Pro.
XB1X Pros:
-Better 3rd party patched/enhanced games, often 3-4x the resolution (sometimes with other improvements)
-Better 1st party patched/enhanced games, same as above
-Can sell your XB1, making the upgrade path a bit cheaper than the PS4 Pro
XB1X Cons:
-Miss out on a bunch of other exclusives
PS4 Pro Pros:
-Better 3rd party patched/enhanced games, often 2-3x the resolution (sometimes with other improvements)
-Opens you up to a bunch of new exclusives
PS4 Pro Cons:
-Slightly more expensive if you keep your XB1
-Not as big of an upgrade
-Lose out on patched/enhanced XB1 titles
The price difference between both options isn't that big, so it basically comes down to whether or not you're interested in the PS4's exclusives, and if you're willing to sacrifice some performance for them.
But I do disagree that the quality of 3rd party is the same as an exclusive, generally speaking. 1st party games are generally noticeably better in both quality/polish and graphical fidelity IMO. Games are tailor made for the system and IMO it shows.
For instance, if Spider-Man, GT Sport, God of War, Horizon ZD etc., were MP games made by, say, Ubisoft... I have a hard time believing these games would look, perform and be as polished as they are. And that's not a knock at Ubisoft; I just think it would be difficult. These are games going toe-to-toe with other games on machines with higher specs and often times coming out on top. Almost every PS3 exclusive is another prime example.