I believe Lenovo is set to release a Oaktrail based IdeaPad Slate with active digitzer for less than $600.  It runs cool, no fans and gets about 5 hours runtime.  So I think finally we will have something that is workable and within reach of consumers.  Prior to this, sure there were budget netvertibles.  However, I've seen appetizers served with skewers more substantial than the stylus included those past attempts.  So I'm really excited about this Lenovo offering.