I'm afraid of the price.. this looks much more capable and powerful than the Index, which was quite expensive, I suspect it might end up in a similar price range, if not higher. But let's hope.
Interestingly, it seems to be using a snapdragon ARM-based unit. Which means it requires another layer of emulation/translation for running Steam games standalone. It's said it uses FEX (https://fex-emu.com/), probably combined/integrated with Proton.