Eli Hodapp, writing for TouchArcade:

Moments ago, Valve pushed out an updated version of the Steam Link app to TestFlight testers which aside from a few UI tweaks (like a network performance test when you first pair your PC which I’m fairly certain wasn’t in the original build) they also removed the ability to buy anything through the actual app itself. When you connect to your PC via the Steam Link app and browse the store, the button you used to be able to push to buy things has been changed to say “Available to purchase from your PC.”

Hopefully this is all the changes Valve needed to make and we’ll be streaming games to our Apple TVs soon.