For the webby crowd: "Masagin" features animated, recursive SVGs with antialiasing and motion blur at high rez and high frame rate. http://www.youtube.com/watch?v=sbQhgEJuExY&fmt=22
Or, you could download both demos from http://pouet.net/ and run them on your own PC.
the.popular.demo http://www.youtube.com/watch?v=YBpo5GHcmsE
and Candytron (64K) http://www.youtube.com/watch?v=svGk_pF67gc
For some newer releases
blunderbuss by Fairlight http://www.youtube.com/watch?v=ezltebzdgjI
is very different is style but still very cool and two post about the particle system behind the demo http://directtovideo.wordpress.com/2009/10/06/blunderbuss/ http://directtovideo.wordpress.com/2009/10/06/a-thoroughly-m...
Elevated by Rgba & TBC http://www.youtube.com/watch?v=_YWMGuh15nE
is a great example of what people can do in 4K, and they even have a presentation about the technical details http://iquilezles.org/www/material/function2009/function2009...
and
State of the Art by Spaceballs http://www.youtube.com/watch?v=c5kuYfTCGLg is a highpoint of the amiga scene
(edited to add, which I should have clicked on the link to see it had already been embedded)
the.popular.demo http://www.youtube.com/watch?v=YBpo5GHcmsE
and Candytron (64K) http://www.youtube.com/watch?v=svGk_pF67gc
For some newer releases
blunderbuss by Fairlight http://www.youtube.com/watch?v=ezltebzdgjI
is very different is style but still very cool and two post about the particle system behind the demo http://directtovideo.wordpress.com/2009/10/06/blunderbuss/ http://directtovideo.wordpress.com/2009/10/06/a-thoroughly-m...
Elevated by Rgba & TBC http://www.youtube.com/watch?v=_YWMGuh15nE
is a great example of what people can do in 4K, and they even have a presentation about the technical details http://iquilezles.org/www/material/function2009/function2009...
and
State of the Art by Spaceballs http://www.youtube.com/watch?v=c5kuYfTCGLg is a highpoint of the amiga scene
(edited to add, which I should have clicked on the link to see it had already been embedded)