La gente de Opera Software nos deja unos demos de Html5 de unas conferencias que dieron en Berlin http://createordie.de/webinale2010/ Espero les guste:
canvas
CanvasMol
Paranoid 0.2
Canvascape 3D Walker
9elements HTML5 Canvas and Audio Experiment
video
Video controls
Video :hover and transition
Video fancy controls
Video .webm, .ogv and .mp4 playlist
Forms
New HTML5 input types
HTML5 date/time inputs
HTML5 form validation
audio
Audio: The Wilhelm scream
Daniel Davis' Lightsaber (CSS3 transition example) with audio
Fuente: Opera Developer Network