If you are in downtown Philly and want to see something cool, check out the lobby of the new Comcast Center at 17th St. between JFK and Arch St. The centerpiece is this amazing video wall:

It plays various high-def videos accompanied by some very calming new-agey music. Between videos it takes on the look of the wall behind it, so convincing you have to look close to tell it is a video screen.
Here's a recent AP story about the wall:

PHILADELPHIA - This city best known to tourists for its historical sites and museums has a surprise new high-tech hit that is developing into a must-see attraction: a huge atrium wall in Philadelphia's newest and tallest skyscraper where a cast of dancers and acrobats seem to come to life.


"At first it looks like a mural," said Marilyn Overton, who traveled with her husband from the suburbs just to see the wall. "And then all the sudden it's moving."
It's a 25-foot-tall, 2,000-square-foot high-definition LED screen which at times mimics the wood-paneled wall of the main lobby of the Comcast Center, which opened in June.
Mostly by word of mouth, the enormous video installation has been drawing a growing stream of visitors to the 975-foot tower, which owner Liberty Property Trust is hoping will become a destination a la New York's Rockefeller Center.
"We are stunned by the reaction we have gotten," said D'Arcy Rudnay, senior vice president for corporate communications at Comcast, headquartered in the building.
City tourism officials said they added the Comcast Center to their Web site, gophila.com, after both residents and tourists began asking for more information about the attraction.

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The rest of the lobby is just as impressive, featuring sculptures of people walking on beams high above the floor. The plaza outside features a dancing fountain and a restaurant.
I don't know if this is quite Rockefeller Center, but if you are in Center City it is well worth a visit.


- Chris Stanley