Harry McCracken has written an interesting column about the ways the original Mac was and wasn’t influential in its day:
Compared to other PCs of the time, the Mac’s small size and unified design offered several benefits. First, it took up little desk space and made the computer easy to tote around: It even sported a handle for that purpose. Second, ensuring that every Mac user had the same crisp 9-inch monochrome display gave the experience a consistency that was lacking in most other computers, which users plugged into whatever monitor (or TV set) they chose.