http://www.sciencedaily.com/releases/2009/04/090429170554.htm
Excerpt (May 4, 2009):
"In today's world of huge, sharp LCD monitors, it's hard to remember
what a videogame image looked like on an ordinary television of the
late 1970s. Emulators like Stella make it possible to play Atari games
on modern computers, serving the function of archival tool,
development platform, and player for these original games. But
unfortunately, they also give an inaccurate impression of what Atari
games looked like on a television.
An Atari game played on a television would exhibit a number of visual
characteristics that cannot be seen on an LCD display:"