There was a rumor floating around the internet that Windows mobile 6.5 will be officially releasing on May 11th. This started from a simple misinterpretation of what was said by Microsoft. though they will not be releasing WinMo 6.5 on may 11th, they will be demoing some of its new features :D.
Features such as:
Windows marketplace, an app store that comes with every copy of WinMo 6.5, you can go there to get your apps, duh.
They have also gotten rid of the honeycomb, though the icon layout remains the same with enlarged icons as seen in the picture below.