So how future proof is the new Steam Deck OLED?
It looks great, but how does it compare to the current crop of consoles?
There are very few modern PC games the Steam Deck can't handle atm. It's a good investment, as not only are most of the biggest games supported, you'll have access to thousands of older titles at bargain bin prices, not to mention the best emulating platform on the planet, Emudeck, which is tailored for the Steam Deck.
The Steam Deck is very popular, so expect a lot of modern games coming out to continue the trend of targeting its specs. Valve is also constantly improving things with updates. For the next gen of consoles, you'll need to look towards a true Steam Deck successor, or the like, but we're still a few years off.
Fan the Deck made a good video on your query on a couple of months ago. This was regarding the LCD version.
Performance is varied, but It really comes down to developers tailoring things to work on the Deck. Thankfully many do thanks to its install base. The Steam Deck community is also huge and very active, so you'll always find optimal settings tweak guides, for performance and controls, if one isn't set by developers. The Deck's massive ecosystem is a huge selling point.
There's a slight performance bump with the Oled version from what reviews have said, but we're only talking a few frames. Where it also improves notably compared to the LCD version, outside the superior screen and improved battery size/life, is better latency. Look
@Madmick's post earlier to see all the other improvements.
Devices like the ROG Ally are still more powerful, but you're also paying a lot more. It's biggest benefit, IMO, is more supported games thanks to having Windows installed natively. There are some games that the Steam Deck just can't run atm, including Gamepass. Valve is working on Windows support, saying its proper implementation (you can install it, but it's buggy) has been delayed due to the Oled version development.
If I was buying one today from scratch, I'd suggest getting the 256 GB Oled version, and putting in a bigger SSD yourself.