Maybe they've cracked the code with the dongle? Usually, you either have to invest both time and money into setting up the perfect streaming network, deal with annoying cables or resign yourself to inferior on-device game versions. The ergonomics matter more than you'd think.

But if it's a very easy plug-n-play type deal to run SteamVR games (and on Linux!), that's a huge ergonomic improvement. Don't have to think too much about whether everything is running correctly or what-have-you.