Yes, they’ve been pretty clear that there’ll be future models eventually. They’ve indicated that it’ll be quite a while before we see one with a different performance level, though, they’ve suggested the next model will focus on screen and battery life. Whether that’s a proper second gen (replacement at comparable price points) or more like the Switch OLED, a more premium model that slots in above the current ones, remains to be seen.

Steam has not announced anything and every news outlet has been theorycrafting there's one but let's be honest it's the same people who have been saying the switch pro will be out for the past 5 years so take that with a huge grain of salt.

I mean just like anything that is a big success isn’t there always a new model in the works?

I work in a phone store and people always ask is there going to be an iPhone 14,15 whatever the next number. Like yea ? There is going to be an iPhone 40, why would they stop ?

The steam deck is obviously newer and not as established as the iPhone but I would assume with how popular the deck is steam is going to keep them coming. Not only do they make revenue on the deck but also get steam into more hands as the price of admission is much less than a full PC