Microsoft begins accepting universal Windows app submissions
While most of the headlines surrounding Windows Phone 8.1 have focused on the more consumer-facing features like Cortana and the Action Center, but the change on the way that could well have the biggest impact on the Windows ecosystem is the introduction of universal apps. Today, Microsoft has begun accepting submissions of universal Windows apps.
The main criticism of Windows Phone and Windows RT has always been in the app ecosystem. Windows Phone has done well to build up its app ecosystem, but Windows tablets are still lagging behind. Now, developers can not only create universal apps that can run on Windows Phone, RT, Windows 8, and even Xbox One, but today Microsoft flipped the switch to allow developers to link listings in the Windows Store and Windows Phone Store. This means that you could soon see listings that allow you to click the download button once and have the app filter out to all compatible devices. The linked experience will also work for in-app purchases as well.
This should be a pretty awesome feature, assuming developers take advantage of the new options. There doesn't seem to be much downside for developers, because Microsoft has made it a streamlined experience for releasing an app across platforms, now it's just a matter of waiting for the apps to come.
source: Windows Blog