Not realistic without a huge company/dollars backing it.

* iMx8 is not ready yet. The first units will start to be available in the beginning of 2018, and seeing how the whole electronics industry is having a hard time to keep low factory lead time, it should need some time before them being easily available on small orders. Software support will probably take a lot of time too.

* Chen's project is possible because he wants to reuse an existing and validated PCB and "just" adding the keyboard and some tricks. Designing a new PCB is a lot of work, as can be seen with the time it takes to do it by the Neo900 project or by Purism (delivery in January 2019). You can see how chen's own Moto keyboard project has already been delayed to match the expected quality to see that the project has to be kept reasonable to have a chance to be fullfilled