I don't know so much about EGS, but probably some of the following (most of which I don't use very often, I hope I recall correctly)
- Refunds
- Family sharing of games
- Sharing games for other local users
- Being able to lend games
- Remote Play (with friends)
- Remote Play (stream for a local machine)
- Linux support through proton
- probably more?
Looks great!
If your are looking for pur aesthetics, I would recommend trimming the resistors/leds, and bending their leads before putting them on.
If you'd like some inspiration this guy has some of the best looking hand crafted electronics I've ever seen.