How's the current quality? When I used a Windows Phone for a while, the store was horribly swamped by featureless spamware, esp. compared to Apple's store or even Play.
A few of them are decent: MS apps like Weather and Remote Desktop, some products from Abby. But in general, Windows Store is still loaded with featureless poor quality pieces. And yes, even the good apps scream for being "not the right thing" for desktop. A screen real estate seems hugely wasted. It is annoyingly hard to point to giant controls with the mouse on the big screen.