Now, the good news.
First, the Xperia 1 V never became hot, warm - yes, but never uncomfortably hot.
Second, there is no display throttling; the screen refresh rate remained at 120Hz even after prolonged benchmark testing.
And third, the most important news is no more camera overheating! It was incredibly awful for a cameraphone to overheat after just 5 minutes of 4K video recording (Xperia 1 IV, we're looking at you), but that's a thing of the past. The Xperia 1 V is not even warm after shooting for 30mins in 4K, which is excellent news.
The camera overheating warnings are still there in the menus for some features, but we never experienced them, and we hope you will never do, as well.
We played a game for half an hour, too, and the Xperia 1 V was not hot and did not throttle, not obviously, at least. That's why we think most gamers and photographers alike would be happy with the improved thermals even if this was not reflected in the synthetic tests.