Their target group is different. If they would be interested in a desktop app, they would have done it already - and even with this, they wouldn't rely on a rep

Their target group is different. If they would be interested in a desktop app, they would have done it already - and even with this, they wouldn't rely on a repackaged Android app. I expect this to be the case with all the big players. For small app devs, if the cost is really near zero, maybe - but looking at how barren the Microsoft Store is, I doubt many would bother.