Here's one retro gamers in europe might be familiar with, and a heads up for those unfamiliar. The Amiga 1000/500 was released in 1985, 2 years after the NES, MSX, etc. The Amiga 500/1000 was, needless to say, extremely advanced compared to virtually all of its contemporaries, blowing away not only rival game machines but also rival computers. It was one of the most significant leaps in home computing technology in history. It was able to keep pace well into the Genesis and SNES lifetimes when. It was, essentially, a true generation ahead of the competition.
Compare:
NES:
MSX:
Apple IIe:
Amiga 500:
Around 1990, Commodore released a very slight upgrade to the original Amiga graphics chip. The original chip became known as OCS - Original Chip Set, where the new Amiga 500+ chipset became known as ECS, the Enhanced Chip Set. This basically allowed for high resolution still images.
By 1992, the 7 year old Amiga was getting long in the tooth and a much hyped revision was supposed to be upcoming that would have been as big of a boost to then-current graphics as the original Amiga was back in 1985. After delays and revisions, Commodore eventually released the AGA - the Advanced Graphics Architecture for the new Amiga 1200 line, which was backwards compatible with OCS and ECS. It wound up only being a very slight upgrade, compare an original Amiga 500 title to an AGA title:
ECS:
AGA:
A nice improvement but nothing dramatic. The disappointing upgrade that AGA afforded was sort of a dying gasp from Commodore, who closed up shop less than a year and a half later.
Well, the original plans for the graphics upgrade hadn't been scrapped, and continued to progress until the day commodore closed shop as the AAA - The Amiga Advanced-Graphics Architecture. AAA can be seen, functional, on a desk in the documentary
The Deathbed Vigil and other tales of digital angst filmed about the last 24 hours of Commodore.
upclose image of the board (not the functional one from the documentary):
This thing was supposed to be an enormous step up, and bring the Amiga in line with competition from 486 PCs and upcoming 3D consoles like the 3DO. Shame it never got to a point where demos could be created for the hardware.