Here is a list of new features in Windows Phone 8.
Support for new multi-core processors
IE 10 is your browser. Same experience you will get on WP8 as you are on your PC.
Developers gets a big boost by having same development platform as for Windows. No need to learn a different API. How cool is that? Awesome.
Mobile payment goes global.
Pay by Phone
Nokia Map Technology
Support for business. How cool would be to run Office on Windows Phone? I think that's Microsoft is hiding from us and getting ready for it. Lol!
Customizable start screen. How cool is that? I don't have to have my phone look like everybody else's.
More details coming soon ..