Sharp has announced the availability of its 70-inch AQUOS 4K Ultra HDTV in the United States at select retailers and for $7,499.99. The Sharp LC-70UD1U is the first 4K Ultra HDTV to pass 400 Hollywood expert tests established by the THX 4K Certified Display Program, making it the crème de la crème in Ultra High Definition. We had a chance to see this beauty in action at CES 2013, definitely the “Sharpest” Ultra HDTV we experienced — hands down.