Windows Phone 8
This is perhaps the best-looking Start Screen across all smartphone platforms.
Windows Phone 8, coming in the fall, won't run on existing Windows Phones, which will hurt sales of existing Windows Phone models in the coming months, creating acute problems for the ailing Nokia.
The Windows Phone 7.8 update will include the new Windows Phone 8 start screen.
Windows Phone 8, when released later this year, will incorporate the same kernel, networking stacks, file systems, and other central components of Windows 8 for desktops.
A major change in Microsoft's smartphone platform provides core OS, graphics, and Web features across smartphones, tablets, and PCs.
With new OS coming in the fall, sales of Nokia's current Lumia smartphone line could be hit hard.
Analyst cites sources that say Microsoft may offer own Windows Phone 8-based smartphones as well as Surface tablets.
The big winners are game companies, a developer said.
Microsoft says its new mobile operating system, Windows Phone 8, will be deeply integrated with the Windows 8 OS in tablet and desktop PCs. No upgrade for existing WP7 users, however.
If you own a smartphone running on Windows Phone 7 now, you won't be included in the bright future of Windows Phone 8. There is a consolation prize, however--Windows Phone 7.8.