Microsoft kicked off their Windows Phone Developer Summit yesterday by detailing several new features in Windows Phone 8 and filling in some of the blanks surrounding the existing mobile phone operating system. Specifically, Microsoft confirmed that handsets like the Lumia 900 would not be compatible with the new OS due out later this year.

Instead, legacy hardware will be upgraded to Windows Phone 7.8, an OS that will deliver some fresh features like a new Start Screen interface. This admission sparked some debate as to whether Microsoft and Nokia are doing enough for existing Lumia owners. In search of more answers, The Verge recently sat down with Nokia’s Kevin Shields to get some answers.

In a nutshell, Shields feels that Nokia is doing more than enough, pointing out that most customers probably aren’t aware of the upgrade roadblock. He further notes that anyone that walks into a store and buys a Lumia 900 is getting a great offer on a product that has a long lifetime of innovation.

During yesterday’s event, Nokia announced a new set of apps and updates coming to Lumia phones in the US and China in the near future. The Camera Extras app includes burst shooting, an action shot mode and a panorama mode while the Play To app helps users stream photos and videos to any DLNA device, such as a Smart TV, PC, Mac, PS3 or Xbox 360. Both of these features should be available by the weekend.

Counters and Contact Share allow the user to monitor phone usage and share contacts, respectively. Both will be available to those in the US next month.