Don't forget Atari and the Atari ST (Atari 520 ST and then Atari 1040 ST) which had an interesting development path.
Jay Miner (one of the original developers of the custom chips in the Atari 2600, 5200 and 7800) attempted to convince Atari's management to create a new chip that would be used in a Computer/Console. Atari management refused and thus he left and formed Hi-Toro which later became Amiga. However, Amiga ran out of money to continue development and Atari stepped in with funds so that they could continue developing the chip. As part of the deal, Atari got exclusive rights to the design for 1 year and thus the Atari ST was born. The product of a desire to have consoles evolve into computers and thus have a chip that could serve in both a console and computer role.
It's also why Amiga had computers that were so adept and well suited to running games compared to its competitors in the computing space. That fusion of console and computing.
If not for the console crash that followed after Atari 2600's crash, what we know of as the Amiga could have been an Atari gaming console. Faced with such capable hardware as the Amiga had, would Nintendo have stood a chanced with the NES?
This would also require Atari to have approved of Jay Miner's venture, of course.
Regards,
SB