This largest of the large screen TVs will be an object of desire for a while.
It's not going to be cheap, Sharp are listing it at about $10K for Australia and the US but the specification is exceptional.
Full backlit Quattron LED array with the Japanese UV2A X Gen panel is the best that Sharp can do at this time. Sharp have acheived legendary reliability rates with their panels, far and away the best of the South East Asian manufacturers.
Sharp Australia website for the 80 inch.