My NVIDIA Shield is getting old and slow. I can see this as a good replacement, because it supports HDMI CEC, so you can control it with your remote control.

Install Plex, JellyFin, FreeTube et.al. to it and you have a nice open source TV box.

You also get 4k gaming from Steam, GOG, Epic etc. and you get emulators. I've been wanting to build a computer like this, but CEC is hard to find and the adapters that exist don't support full 4k resolution.

The specs for this steam machine say HDMI 2.0, in the past I used a pulse8 HDMI CEC USB dongle with a computer which was also HDMI 2.0 iirc. I was using a 1080p projector with it but their website claims 4k support: https://www.pulse-eight.com/p/104/usb-hdmi-cec-adapter

I recently replaced a shield with an Ugoos Am6b+ running coreELEC, which works okay and supports some stuff the shield doesn't but I miss being able to run some android apps easily. I wonder if the new steam machine will support DV.