Windows users rejoice: the days of only being able to install apps on five different devices will soon be over. Starting October 9th, apps purchased with a single Windows Store account will be sharable among up to 81 devices. If you recall, we learned back atBuild that Microsoft would be increasing the app roaming limit, but today's announcement clarifies some key details nonetheless. Says the company in a blog post: "The change we're introducing will reduce the friction that most active customers have in being able to access their favorite apps from any device, and will give developers additional opportunities to monetize." This of course means one other thing: you're going to need a bigger backpack.