I don't see consoles becoming super computers and completely doing away with laptops and desktops. This, again, is more of your dream world, your dream reality, than the actual reality we are currently living in. 

You want them to be done away with because you dislike having to use them and would vastly prefer that no one else would have to use them.

It's inevitable IMO. It could still be decades away, but there's gonna come a time where instead of buying new consoles we just download an app on our mobile device, computer or TV and stream the game to that platform. It's just a matter of time before companies have the infrastructure to stream games (near) flawlessly and until almost every household has an internet connection good enough to stream games.
It also wouldn't surprise me if one day Sony releases a TV with a build-in PlayStation, or if Microsoft releases a Surfrace Pro with a build-in Xbox or Xbox emulation capabilities.

If we can beat the laws of physics and eliminate any latency while streaming from a server, sure.

Otherwise some form of local HW and upgrades are always needed. Especially with the move to VR and higher frame rates latency becomes more and more important.

For now, latency free streaming dual 8K at 144 fps, kind of a minimum requirement for VR at current display quality, is very much sci-fi. Actually the bandwidth can be lowered with foveated rendering, however to measure your gaze, send it to the server, render frame, compress, send back, decompress, all within 7ms, good luck.

A combination of server based games with local hardware for frame adjustments / interpolation could work. Sort of like ps4's 60 to 120fps reprojection, yet a lot smarter.

And then we get holographic displays which increase the processing power need by an order of magnitude.

If there is a time where developers / platform holders no longer feel they need to progress; I am done with gaming.

The way it is now, even given 100 years, we won't reach a level of graphical fidelity I am happy with.
If there is a point in my lifetime that the industry is stagnant, that will be my jumping off point.

Whilst 100 years is clearly just a number I pulled out of nowhere, I don't think 20 years will be enough.

Yes for me this generation already did that. I am not saying that games will never get better or that this is a fact, but imo I prefer last gen games. I prefer the 360 to the Xbox One because I enjoyed the quality of games back then more. So for xbox I think this already happened for some people like myself. I am considering selling my xbox one and joining PC master race.

Well, we don't really need new consoles as it is. However, the manufacturers want people to keep buying new products to avoid lessening sales, so as long as they can keep doing that, they will.

It may be possible, but not anytime soon. Technology is always advancing and consoles eventually reach a point where they reach their limit and need new hardware. There will always be something that can be approved upon for the next line of hardware.

Not in our lifetime

Unlikely, since selling hardware is good money for companies. If they can make a profit with selling hardware, they will continue to do so and to make new consoles for people to buy newer versions