We went from 16 colours to 16 million which is what the human eye can distinguish. We went from 2D to 3D which is what a human mind can comprehend. I suppose a 4D game in 16 billion colours wouldn't make sense. LolThe human eye can distinguish a lot more than 16 million colours (we wouldn't need HDR tone-mapping otherwise, 24-bit RGB is a very crude representation of real light...) -- as a basic test, use photoshop to paint a gradient from (0,0,0) to (0,255,0) on a high-res canvas; you should see obvious colour banding. A human rod-cell can be activated by a single photon, which I'm pretty sure your monitor can't emit reliably.
Yes we transitioned to real-time 3D a long time ago, which just means we've got the projection of the geometry correct for a pin-hole camera (not at all correct for a real camera or a human eye though!). We're still a long, long way from "photorealism" though, as indicated by the amount of computer graphics research being published each year.
The basic tools of trade wont' change, as per the most of the forum especially the clever answers from hodgman.Existing tools will continue to be used, but that doesn't mean that new tools won't appear. It may well be that John Carmack falls in love with Rust and decides to use it to make his next engine, or he might go back to using C, you'd have to ask him
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