The thing with new, game-changing technologies, products or ideas, is that to thrive it needs to find an organization that will accept it. Adaption of any new technology has severe implications; it not only changes the organization but often times creates a new industry or segment altogether.
An architectural innovation challenges an old organization because it demands that the organization remake itself. The simple explanation is that a market leader in producing printers is much likely to accept breakthrough innovations in printer ink technology as there is no real organizational stress in pursuing that product line, and highly unlikely to accept the idea for a personal computer as there is little organizational mechanism for paying attention to the innovation and nurturing it along.