@Sooty
Nice theory, but the plethora of "Full HD" labelled 1080p kit down the shops says you're wrong here.
However, you piqued my interest so I had a trawl - OMFG!
It appears that the original plan was to have "HD ready" refer to 720p or 1080i kit (dunno where I got 800 from in my orginal post - silly me), while "Full HD" referred to 1080p capable panels.
So I was right, but things have moved on as the marketing types have stuck their oars in and depending on which manufacturer you look at, we now have:
"HD ready" and "Full HD" as originally stated.
"HD ready" and either "HD ready 1080p" or "Full HD" (kudos to Sony for running two logo stickers that mean exactly the same thing).
"HDTV" (HD tuner).
"HDTV 1080p" (HD tuner wot does 1080p and a screen to match.
"Full HD ready" (now we are in lala land - and special thanks to Toshiba for that little gem).
etc. ad infinitum.
No wonder there's so much "what does it all mean" and "what should I buy" traffic out there. They've taken a relatively simple labelling scheme and turned it into a minefield of confusing bullshit.