For a couple years now, I've been collaborating with EFF to produce a Catalog of Missing Devices: products that do something legal and useful and desirable, but don't exist because to make them, you'd have to break DRM, something US law bans.
It's hard to miss something you never had, but maybe the Catalog can help people get a sense of what they've lost. There's more designs coming, too! I'll be sure to update you ask they go live. You can get all the current entries as a hi-rez PDF.