Some years back I actually managed to acquire an Intellivision Keyboard Component. This device is practically the unicorn of the Intellivision world. Click on any of the below images for full-res versions.

Had this not been made by a toy company, it would've been a stout computer for the era. Very capable graphics and sound, dual CPUs (1 6502, 1 CP-1610), around 22K bytes total RAM (split up among 16K x 10 shared RAM, 752 bytes of 8-bit RAM and 352 words of 16-bit RAM on the CP-1610 side and an additional 960 bytes (or was it 1024?) on the 6502 for video), a block addressable CPU-controlled 4-track (2 digital, 2 analog) tape drive, two cartridge ports (6502 and CP-1610), a microphone port, two video controller chips, Microsoft BASIC...

But it was hella expensive and was still thoroughly a toy. For instance, by default, when you typed the machine would make bleeps and bloops based on what key you pressed. Riiight. And, there didn't seem to be any real intention to market it outside the home market. The machines that truly survived that era found niches in schools or business. Ah well.