Video courtesy of asus
Way back in January 2010, Lenovo announced the IdeaPad U1 Hybrid Notebook. It featured a display that detached from the keyboard and turned into a standalone tablet. It ran Windows 7 Home Premium in its keyboard notebook mode and ran Lenovo’s own Skylight OS when in tablet mode. It generated quite a bit of buzz. But, it did not appear as an actual product. If it did, it does not appear in Lenovo’s website as viewed in the U.S.
Asus, on the other hand, is reported to have shipped a very similar product.
ASUS ships Eee Pad Transformer as its Android 3.0 tablet (Electronista)
It runs Android in both notebook (physical keyboard) and tablet mode. This is interesting since Google has repeatedly said that Chrome OS is for devices primarily designed for keyboard input (like notebooks and netbooks).
I could not find any information about U.S. availability of the Eee Pad Transformer.