Size Matters

Can anyone venture a guess as to why television sets are getting bigger? And flatter. And plasmatic (sorry Wendy O).  And surround sounded. Is it because our family rooms are getting bigger and we are sitting farther away from the screens? Is it because boomers are getting older and can’t see and hear as well? Is it because it allows manufacturers to extract larger margins? 
Nope. Nope. Nope.
It’s because we can now watch Grey’s Anatomy and other TV shows streaming on our computers making “size” and comfort the only real differentiators for TV. Size, I guess, does matter.