More details are found by UMPCPortal about this new device, The Asus R3:
5.6" screen, 1024x600 (jkk thinks it's 4.8. Could be.)
I have to say that I never liked the design of the R2H, it was just terrible. But this one looks good.
Update: It uses Linux, I still not sure if this is a MID or a UMPC.