I believe it's a fantasy/for funsies mock-up of what the gaming store/launcher application Steam maybe could have looked like if it was done in a style similar to Windows 7's styling and other computer applications and websites during that era. Looks like maybe MySpace and Windows Live Messenger may have been some inspiration

I hope that helps. I may be leaving stuff out or wording things oddly since I'm pretty brain foggy due to health issues, but no one had answered ya (that I can see) and I wanted to try to help ya out 😅