We have all that, although most of it from smaller Chines manufacturers. More than that we do have truly open source hardware, you can download schematics for almost anything, modify and design your own chips and circuits based on open designs, dream up your own hardware, and if know the right people in Shenzhen you can email it all to them and they'll build it for you.

The reason so few people take advantage of any of this is that it didn't turn out to be that useful.