There is a very impressive app from stand ford, namely vectormagic. It converts bitmaps into vector graphics. Vector graphics are made of geometries and can be enlarged or reduced and there won’t be any anti-alias effects. More importantly, I think it has an artistic effect which is very attractive. It’s just abstract enough to remove the details that doesn’t matter.
VectorMagic is available at http://vectormagic.com
It will be very interesting if they make a vector graphic digital camera!