that actually looks amazing, I would buy it in a heartbeat and I haven't touched Windows in 20+ years.
I grew up with Windows 3.11 and '95/'98/XP/NT/2k and I think my sense of good UI is frozen at that period.
It looks wonderful, my only suggestion would be for the logo on the back of the phone to be a silhouette of the actual Windows 95 logo. And maybe footage of Solitaire. Or SkiFree.