Actual new SKUs for the OS:

• Windows 7 Starter (limited to three apps concurrently)
• Windows 7 Home Basic (for emerging markets)
• Windows 7 Home Premium (adds Aero, Touch, Media Center)
• Windows 7 Professional (Remote Desktop host, Mobility Center, Presentation mode)
• Windows 7 Enterprise (volume license only, boot from virtual drive, BitLocker)
• Windows 7 Ultimate (limited availability, includes everything)

Starter edition : seems this edition will be offer to netbook to cut the cost with limited features
please note : Starter will not be offered through Retail market.

Enterprise Edition is for Enterprise Businesses - sold thru VLK

Thanks
E.Ravi