Yeah if the game is great that's fantastic. (I think it is going to be boring but I'll rent it or sub to the pass for a month, beat it, and cancel the sub). With the way the programs are set up now there is zero reason to go out and purchase a hard copy for $59.99. Especially for a single player game which I bet will be able to be knocked out in 7 hours.
Now here is another giant elephant in the room. As more and more of these subs come via publisher or 1st party for all access or game pass, more and more (Christ, if not all of them) are being launched in either mediocre quality states or half ass developed. As the model changes to more subscription, expect less effort into AAA games as a whole and you can already see that across MS's 1st party Gamepass titles as well as EA (Which have always sucked the last 6 years) and the latest debacle of Ghost Recon Breakpoint and Ubi's new service.
These games will continually fall down an even lower effort path because high end revenue from full price title sales will be less than subscribed prices (Due to people just subbing to a service for a month to play a game for 12-15 rather than pay 59 for it) and they will need to adjust development costs to compensate.
Protip: If you see a game title launch that has a subscription method available from the publisher to attain full play rights on said title, if you go out and spend $59.99 you are a God Damn knucklehead. 1) You have a much cheaper way to procure the game. 2) The quality will not be the same as 5 years ago in a full priced title with the publisher knowing they will make less on the sub, which means less investment they can make in development as these idiots see the sad fact: Consumers subbing for one month for one game and cancelling as the industry figures out they cannot pump out content like Netflix to keep long term subscribers.