One of my requirements was Steam (either locally or Steam Link) and EmulationStation. The Shield cost nearly the same money as the AMD Ryzen mini-pc I’m using, so I just decided to go with the more powerful device so I could run light to moderate Steam games at 1080p in addition to In-Home streaming. I use my gaming PC for WFH, so on days I work my kids wouldn’t be able to play games from Steam unless it was local.
I think out the door I spent about $230 for a Ryzen 5000 series APU machine with 512GB of SSD and 16GB of RAM. With the shield at ~$199, I went for the more DIY solution, which isn’t for everybody, but I’m an tinkerer.