Running games and other fun apps on smartwatches is nothing new. Plenty of people have been doing it in the past few months. Nick Lee has shared a video that shows an Apple Watch running Windows 95. Considering Apple Watch’s processor and storage space, the device should be more than capable of running old software.
As you can see in this video, Windows 95 was not designed to work on a small touchscreen device like the Apple Watch, so it’s probably something you’d want to try.[Source]