Open Hardware is Similar to . . .
. . . the FOSS movement which produced Gnu/Linux.
No, of course not, Open Hardware is not like Linux. Seriously?
The Open Hardware movement is similar in many respects to the free and open source software movement that produced the Linux kernel and the GNU system.
The point regarding vendor lock-in is paramount. The community at large is sick-n-tired of vendors like NVidia, Broadcom, and others, who without regard for the free development community to "lock-out" software or hardware driver developers from certain platforms (Gnu/Linux, &c) forcing "lock-in" to other platforms... the 21st century has no patience with this working into the future.
The second point that needs to be explored is how much should "we the users" have as input to the hardware development process? At a bare minimum we need to know how the device works, and have clear and concise APIs for application and kernel development. ---no more proprietary firmware (we want the source) and no more propietary kernel blobs... the frimware does not belong in the kernel, period. If its not in the device itself, put it in a file, and give us the source.
And the thrid point is that we need hardware standards. Everyone is sick-n-tired of fourteen different wifi card|standards and several different video standards. We need industry standard open wifi and open vidieo (audio).
Open hardware is important, but its not like the Linux kernel. Gnu/Linux is open, and the hardware|firmware needs to be open too. If that is what is meant by "like Linux," well, ok...