Right, but from what I've read, Linux streaming is unsupported at the moment, so if you're not using Windows for your gaming rig, you're supposedly SOL for now. I'm sure that will change in time, especially given how many improvements they've made to the Steam Deck.
Edit: This is not the article I originally read about this in, but I found another post talking about it https://news.ycombinator.com/item?id=49706428 and it references Linux Tech Tips from 2 days ago, so if it's been fixed, it was fixed recently.