The will not last as long as the pyramids, stone is a very good building material, metals which we use is very reactive and won’t last long without maintenance. If humans went extinct the first thing to go will be the metal buildings, the pyramids will last way longer.
I would call the difference between PS3 and PS4 just a bump in CPU/GPU there is a huge difference. The PS3 cpu architecture is completely different from the PS4. The PS3 uses a custom PowerPC architecture. The PS3 can be used to make super computers.
https://www.theverge.com/2019/12/3/20984028/playstation-supercomputer-ps3-umass-dartmouth-astrophysics-25th-anniversary
At the same time, gaming consoles were simplifying, making them less useful to science. The PlayStation 4 outsold both the original PlayStation and the Wii nearing the best-selling status currently held by the PS2. But for researchers, it was nearly useless. Like the slimmer version of the PlayStation 3 released before it, the PS4 can’t easily be turned into a cog for a supercomputing machine. “There’s nothing novel about the PlayStation 4, it’s just a regular old PC,” Khanna says. “We weren’t really motivated to do anything with the PlayStation 4.”