Another problem is that Windows Store apps suck on the desktop, so being able to run them on a desktop is meaningless. Apple got it right, tablet and phone are different to desktops and laptops.
And touch screens on laptops and desktops will always be secondary to trackpads (or I suppose mice). The price of the touch interface on the two or three 27 inch or larger monitors you have on your desktop would be better spent on a 4K screen instead.