The SOL-20 was probably the first PC to incorprate a keyboard and video with the machine. This form factor obviously became the norm when the Apple II debuted a year or more later
The SOL also included ROM "personality modules" that allowed the computer to have some native code at power on. Other than that, however, the SOL-20 was a fairly typical S-100 system in a different package.
See also : Helios II