This also, for first half is just the vibes that I can agree and different people can have different vibe, as well as almost a stop in technological progress compared to what 80's to 2000's was like.
The thing about video resolutions does not make sense. "2160p does not count because it is just a form of HD." Well what else are we going to have? You do know under the hood 4K 60 and other upgrades to these "just a form of HD" actually need now HDMI 2.1 cables that have additional pins. We just have made a standard that has stuck and will likely stick a long time. If we applied this logic to composite video, then nothing would be considered retro from 50's to 2010 when HDMI connected TV's were finally common. Never mind that for many first years of PS3 and Xbox 360, most people still used same Composite output from their console with their SD Analog tube TV's. PS3 age was the transition to HD age, not a slam dunk adaptation of it. PS4 is the first console to not have the option of older standard and HDMI, 720p and compatible screen is a must while Xbox 360 and PS3 can be still plugged to old TV's from composite to RGB or even component if that half way there is OK for you. RGB scart also in europe and Xbox 360 even has a VGA Output option cable. Very dreamcast of that device. This all also before we remember or learn for the first time that Tube TV's also had two resolutions with video games, depending on your locale but for simplification sake NTSC 240"p" lines or 480i lines, some had 480p even, or sidegrade like Dreamcast VGA compatibility or whatever else went on with PC's and high resolutions of late game VGA monitors. From NES to end of PS1 240 was most common resolution, and for one generation 480i was the most common resolution, and then we got 720p or even occasionally 1080p rendered thing or two. Though so did xbox and PS2. So, is PS2 not retro because few things on it are in HD? is Xbox not retro because it also did HD? They did not do it through HDMI but they definitely had it with asterixes. This in mind, the leap from commonality of 720p to commonality of resolututions between 1080p and 2160p because it in console or even PC terms is almost never actually 2160p, we have leaped way harder in image definition than we did for first 30 years of gaming, and all that on cable that would have in the end 50+ years of use. The likelihood that HDMI will too if they keep upgrading just the signaling between devices and not the cable itself substatially, will make this rule, also, silly, since we will be using "just" a form of HD for foreseeable decades to come, and for that denying notion of retro from any tech that old.
What we consider is arbitrary but some people have very weird arbitrary look on things that I am now a dedicated villain of poking holes at here.