This article does a good job of talking about how poor the windows experience on a handheld is, and why SteamOS could dominate handheld devices if windows doesn't start to make serious changes to improve it's useability and performance.
To be clear, I don't want to see windows succeed here, I would absolutely love to see SteamOS take over the handheld space and be a real linux ambassador to show people that they do have other choices than windows for their computers.
I did something similar actually. My only experience with arch was using manjaro years ago, and I had a lot of instability and broken systems after updates. I swore off arch-based distros for years because of it.
After valve announced they would use arch as their base for steamOS, I was skeptical that arch would be a good base for a consumer product and decided to try it again. I picked Endeavour for easy install, and it was great. Turns out all the issues I had with Manjaro before were more of a Manjaro issue than an arch issue.
I've been using endeavour as my main OS ever since, and it's been great.