After Monday’s announcement of Surface Tablet, here’s another big thing from Microsoft – the Windows Phone 8.

Windows Phone 8 will ship this fall with the very same kernel that is found in its upcoming desktop and tablet operating system, Windows 8. Windows Phone 8 will support multi-core chipsets and will be optimized for dual-core processors at launch and it will support 720p and WXGA display resolutions. There will also be a microSD slot for memory expansion and for browsing – it will utilize the Internet Explorer 10 complete with malware blocking, faster JavaScript performance, and double the HTML5 feature support of Windows 7.5

Microsoft’s Windows Phone 8 core will enable new hardware types according to the company, and it will also allow developers to easily build apps for both Windows Phone 8 and Windows 8 and port apps from one to the other.

Near Field Communication (NFC) is also coming with Windows Phone 8 and Microsoft will introduce a new mobile wallet feature. This wallet will support banking and credit cards.

Bing maps will also be replaced by Nokia maps which will enable users to render offline maps and free turn-by-turn navigation.

Windows Phone 8 will also alter the previous Windows Phone start screen. The home screen now supports resizing of tiles, new live tile features and much more. Tiles in earlier versions of Windows Phone were confined to two sizes — a square or a rectangle — but Windows Phone 8 will support smaller tiles, larger tiles and wider tiles to make full use of the coming wave of higher-resolution displays on Windows Phone.

Though Microsoft confirmed that all Windows Phone 7.5 “Mango” apps will run on Windows Phone 8 an OS update couldn’t be possible due to hardware requirements – technically killing and making all Mango phones obsolete.

So, how about you guys, would you buy Nokia Lumia 900 now or wait a little longer for Windows Phone 8?