It's good to see how Microsoft keep updating individual Apps that are part of the OS such as Mail, Calendar and People. And this is something that differentiate the update process from Microsoft to the one from Apple were everything comes in the shape of firmware updates.
In todays update a lot of improvements were done and more details about them can be found here. Another good news was posted at Surface Blog. Panos Panay acknowledged the Limited Connectivity Issue in Surface RT and the lack of pressure functionality in Adobe Photoshop with Surface Pro and expressed Microsoft's commitment to fix these issues.