Apple's $5/month game service was too nice for others to not copy. And well, Google did just that. Released "Play Pass". At $5/month you can run all the paid apps that it covers. Right now it's 350 apps, but will increase over time.
This model sounds so nice, that I guess pretty quickly it might turn out to be the future. Pay $5/month and you don't have to buy any app again. App developers will also have better return as people as a whole are now paying more.