It occurred to me yesterday, as I tried to get up to speed with my new job, that if we had plugs in our heads and the ability to download information quickly and easily directly into our brains, then even very specialised people could be replaced in jobs at a moment's notice. As long as you have the job-specific knowledge ready to download, you can step into any position and pick up where the last guy left off. It would still be important to find someone who worked well with the rest of the team (if applicable), but finding someone with the right skills becomes meaningless.
Mokalus of Borg
PS - It would certainly help productivity of new employees.
PPS - And interviews would become much more about personality than skills.