Terminal usage is inevitable with Linux. It's not as scary as it seems and can actually create a sense of accomplishment when you use it. Pop is a solid distro for sure but you don't need a "gaming distro" to game on Linux these days (not that Pop is a gaming distro specifically). There's actually a Linux Experiment video where he proves this with a thorough test. All major distros work fine for gaming.

I encourage people to not go for SteamOS unless you're setting up a PC you want to use solely as a home console, or if you're flashing it to a different handheld.

That, all coming from a big Valve fan. I simply don't think it's a good idea for people to get their hopes up over SteamOS somehow being a no-terminal, peak gaming Linux experience. I also don't think it's a good idea to hold off until SteamOS gets its full PC release, because most major distros today will work just as well. It'd literally only benefit people to start learning Linux now so that by the full SteamOS launch, they'll be more informed as to whether it'll be something they'll find useful enough to use as a daily driver.