A lot depends on what happens with China. I don't think Xi will attack Taiwan, but then I didn't think Putin would attack Ukraine, either.
If Xi goes for Taiwan, then yes, GPUs will appreciate like real estate ("Buy now! They're not making any more of it, you know!") for the next 10 years.
If GPUs appreciate like real estate then we'll probably see game graphics flatten in response. AI will continue to be a money sink no doubt, but if you have a good card in 2026 you're probably fine for gaming for the next 5 years.
If Xi goes for Taiwan, then yes, GPUs will appreciate like real estate ("Buy now! They're not making any more of it, you know!") for the next 10 years.