Microsoft's biggest problem is that it has nothing to sell that attracts customers to the store.
Windows is already pre-installed on PCs. Microsoft Office is already pre-installed on PCs - at least in a trial state.
Microsoft sells no PCs other than the Surface Pro tablet.
X-Box and its games are already sold in numerous venues - Gamestop, Walmart, Target, Costco, Best Buy, etc.
Microsoft accessories - like keyboards, mice, etc. are already sold in...