They're going to back off on this and replace it with something bad but not as horrible. This is testing the water, and opens the door to charging everyone money every time you install a game, not just devs.
Have an install saved on your external and want to install it next week? You'll get charged for it as of you didn't already pay for it.
Games you have in your steam/gog backlog? Get charged again for it when you decide to play it.
I guarantee there are investors/publishers/whoever hitting themselves right now screaming "why didn't I think of that?".