It's 19 years since the iPhone came out, that's almost two decades. 19 years before the iPhone was 1988. Things from 1988 definitely seemed dated in 2007. In fact I think style/aesthetics change is now getting slower and slower. Anything within the last 10 years looks like it could have been made today, since the image resolution / quality doesn't significantly change in such an obvious way. Throughout the 90s and 00s, it felt like things were constantly changing year to year. Totally different mindblowing graphics in games in each release, new OS features, digital cameras, cell phones (at all), then color screens on dumbphones, PDA, smartphone etc. etc., any Internet at all, then broadband etc. It subjectively felt much more rapid than today. The only exception is AI today, but even that is a different feel.
I think the tells of AI video are becoming more subtle, similar to language. It's no longer so much that the visuals are categorically impossible, such as mangled hands or impossible geometric arrangements of objects, but you can still see style and composition that is more frequent in AI video (but could be possible in a real video as well in principle).
Such as higher production quality, too beautiful people, a kind of stock photo sheen, etc. Of course if you use special LoRAs or prompts and input images, it's possible to leave the stock footage style, but most people don't bother with it, just like most people use stock ChatGPT in its default voice with its favorite trope-filled cadence etc.
