Looks cool but the only reason I'd do this is if the games are significantly cheaper or if I didn't have a console that could run things at the performance I want. Neither of those seem to be the case so far though. They really need a GamePass like vault where you pay $15 a month and then can buy the newest stuff on top of that.
I'm sure as time passes, the lineup of games for $10/month will come more in line with a service like Game Pass.
They're not obviously going to charge $10/month forever for Destiny 2. It will grow into that, but it's just launching, you can't expect hundreds of games day 1 either.