Not to take anything away from ARM, who doesn't build and sell chips but rather sells/licenses IP, all of those devices use Nvidia's Tegra platform which combines an ARM core with an Nvidia GPU on the same die. The whole computer fits onto a module around the same size as a ram stick. All you need is a board to add the connectors, and you're set. http://www.youtube.com/watch?v=N6ZDgvXsYDM

Actually, those devices use the Tegra chip from Nvidia which combines an ARM cpu with Nvidia graphics and multimedia processor on the same die. ARM doesn't make hardware. They just sell/license their IP.

correct.

if they're not biodegradable, then how do you dispose of the millions of bags that are thrown in the trash every day? where do you put them?

you under-estimate the number of plastic bags thrown away each day. They aren't only used in supermarkets for your groceries. Practically every store uses them (clothing, electronics, books, everything). There is also plastic packaging. Plastic bags ARE a HUGE problem.