Wolfram has just released the most important advance in the 20-year history of his program,
It's apparently no longer Mathematica - it should be called Civilization II instead, except that it is a name of a famous game. ;-)
Look carefully how some of these features get packed (full screen):
Thanks to AA Torok.
See also: Stephen Wolfram's blog
Competition: Maple 11
In related news, Maple has released Maple 11.
Buy Mathematica 7.0.