Samsung's newest TV is really big, in every way.  The top-of-the-line set from the South Korean electronics giant has a curved, 105-inch screen, a dramatically sharper picture -- and a 120-thousand dollar price tag.  That six-figure price pays for more than just the TV.  Samsung will send a technician to a buyer's home to demonstrate the TV's features and to make sure it's set up to exacting standards that get the most from the high, and high-priced, technology.