Funny.... I also just dug an Eee 901 out of a box (it used to run Windows Home Server).

Honestly, just grab a Raspberry Pi for your retro gaming console. It almost certainly does the job better, and the power usage difference will pay for itself soon enough.

RPi is way slower than Eee 901... You'd get many more demanding games working smoothly on Eee than on any RPi. I have RPi as well and was considering making a RetroPie console, but performance was not there. You can even buy faster handheld consoles from China for $25 these days...

I'd suggest a Raspberry Pi 3B+ (can you even buy an original Pi?), with more than 3x the single-threaded performance of an original Pi. I'd wager comparable single-threaded raw performance to the N270, a 10 year old chip at this point.

GPU performance, I'd put my money on the Pi 3B+ over the Eee. Heck, I may even get mine running again to run some benchmarks... or Google for the inevitable raft of folks who already have.

I would need to see data supporting the assertion that it is "way slower than Eee 901". Off the top of my head, I'd expect it to trade blows with the N270. I'd also be surprised if the support for the Eee 901 was anywhere near as strong as the Pi from the retro gaming community, but, honestly, I haven't put together a retro-gaming rig since, maybe, 2001. Maybe it's time to put together two...