1) with Valve's Steam Deck and the console-like experience for the Store on their Steam OS, PC GAMING is going to reach a broader market : you no longer need to install Windows, figure out driver updates or even how to use Windows, etc. in order to benefit from STEAM. edit: I have seen these type of gamers in the reddit discussions : they know about PC GAMING, they want a part of it, to enjoy it like their friends, but they never really got into the whole "building a pc" .. but now they are looking at the possibility finally of playing "PC games" on the Steam Deck (which is "good enough") ... not to mention the countless discussioons comparing the Switch and the Deck
... which ties right into #2 :
2) now you benefit from HUGE sales all year long. Every weekend games go on sale. Every holiday season there are huge sales.
You might argue there are also sales on PS/Nintendo, but I don't think they are as good there?
Plus, with Steam you get access to a huge catalog of "pc gaming", including so many smaller and super cheap games, many of which are actually quite decent.
Basically, if Valve gets thing right with the Steam Deck OS and their rumored "console"... pc gaming is reaching into the console market which they could never do before. And over the years the PC could become a platform to converge to since it is now on handhelds (Steamdeck) and games developed for it can provide a console experience.
And since SONY & al are already porting more of their games to PC, with controller support etc... their games are pretty much already "steam deck verified" and will be a premium experience on the future Valve console, so they've kinda already dug themselves into this "converging towards PC architecture" hole.
Imho the only question left in this scenario, is whether Linux platform + PROTON will be able to support AAA games consistently... but it looks like Valve is confident about it.