Apple's iPhone OS is fully-functional for the most part, but it has restrictions. I'd love to see some of them go away. But having the presentation designed specifically for touch input is what makes it work. And it's no small feat. It's something no one else has yet done as well. Microsoft is likely a long way away from anything comparative, yet it's what they need to have even a remote shot at anything tablet related.

MS developed and showcased Surface only to have it relegated to some passing curiosity and tech-demo. They might have sold a few of them, but the whole thing might as well have been a one-off. Fantastic opportunity staring them in the face, just to be ignored. Not to mention they clearly had the talented minds to be able to do something quite unique at the time.

But we all know what roads they've been plowing down. Maybe their hardware partners like it that way, I'm not sure. Most of those partners aren't dong so well and Microsoft, while still making some nice profits, is losing market share in a number of sectors, while in others, putting themselves in a position from which they can practically never hope to climb back to relevance.

The point is that you can't do a desktop OS on a tablet device. It's like running a car with horses instead of an internal combustion engine.