I believe that gamepass will be a console seller and MS is positioning it as a auto sub for anyone looking to purchase a MS Console. By MS having all of their exclusives day one playable from gamepass, MS is positioning gamepass to be a purchase right along with the console since you instantly get 100+ games you can download and play day one. You really cannot dismiss the advantage of playing all MS exclusives not including any of the extra content they get on gamepass as the library increases. Including PC into the space add even more advantage as this can be an easy entry for some to purchase the console and get ultimate. Its a very smart business model and something the competition doesn't have and cannot replicate. If MS continue to add more high profile content to the service and market it correctly, it can be something that truly separate MS console from the competition.
I know for me, this E3 with a lot of games I am interested in coming to gamepass, this is the first time I looked serious at the service and purchase a sub.
And what exactly is stopping Sony and Nintendo from replicate it? I mean Sony already has the PS Now, they just need to match the price.