With a sufficiently wide lead in energy efficiency, just selling hardware without any follow up lock-in harvest can be attractive even for a company as spoiled

With a sufficiently wide lead in energy efficiency, just selling hardware without any follow up lock-in harvest can be attractive even for a company as spoiled as Apple. They'd likely want to make the modules offered sufficiently big to make them unattractive for desktop use or else they'd risk cannibalizing their lock-in market.