Get your 32 bit or 64 bit Windows 8 developers build right now to see whats new.
Windows 8 Developer build has been released today for people to try it out. It comes with the brand new Metro UI which makes it very “tablet” like. The build is targeted for the developers so that they can understand the on-screens widgets and how to start developing their apps compatible to it.
The download is available packaged with developer tools. But for end users Microsoft has also provided normal 32-bit and 64-bit versions excluded of developer tools for smaller download size. These end-user version will even keep your settings and files intact if you upgrade, whereas it is necessary do a clean installation for the developer tools version.
All the versions are available to download @ Microsoft website