I get what you’re saying, but it’s probably worth pointing out that the Xbox was built on the ashes of the Dreamcast. The Dreamcast ran Windows CE, a precursor of sorts to Windows Mobile. Microsoft was perfectly happy using an already wounded Sega, who had mismanaged their last two console generations and lost a lot of users to the then fairly new PlayStation line, as the test bed for the software platforms that would eventually power the Xbox, though under a slightly different hardware platform. This is why, among other things, the Duke controller looks very much like a Dreamcast controller.

Like a lot of things that Gates did, he was standing on the shoulders of giants.