7%. That's the gains on AMDs new APU. You're going from 48 to 51 FPS.
What's impressive to me is how efficient Valve and AMD got the custom APU that it's taken this long to catch up. The next generational leap will be worth it, but talk to me when we're looking at 25-50% gains. Then you'll be looking at having a real upgrade cycle.
The secret sauce is in the whole package. SteamOS, the controls, and the form factor.
The other dumb part is that when their manufacturing capability does significantly improve, AMD will happily sell similar chips to other people. And Valve won't care in the slightest. Because all they want is people on PC so they buy games, many of which are through steam.
Linux being relevant is a bigger benefit to them than any revenue from the deck, and they've already demonstrated that it's capable of pretty much any game that doesn't actively exclude it.