Don't think it's 3D printing process used to make the magnets. The host says they put in a blank magnet and the machine imprints on it. Only a guess but I would throw out that the machine 'forces' small areas/section/"pixels" to take on a given polarity. I have guess-ier guesses on how that is done - based on briefly seeing the machine in the video and my experience (de)magnetizing steel parts, also affecting magnet strength via heating magnets.
They do show magnets that are not round in the video as well. With the few applications they show and talk about, I can see round form factor being the most popular.
You can buy flexible magnetic sheeting (McMaster Carr) that has alternating magnet fields. Simply doing this will increase the attractive strength. I was told that you can find this with type of magnet common with refrigerator magnets.
I forgot about these polymagnets when designing a selector switch for an interactive - sort of reinventing the wheel. When reminded, didn't have time to redesign the switch. I was utilizing the push/pull based on rotation aspect. The selector switch has a really nice (detent) feel that shouldn't wear out and it always snaps to a selection, which was a user/interactive attribute I wanted.
@R Amazing Magnets:http://www.amazingmagnets.com/show-deci ... t-std.aspx
-Peter (Mr. Magnet/Negatron)