I know what 10W feels like because the Jetson Nano draws that, and Raspberry 4 is 7W with GPU+4 cores saturated.
You will need a heatsink on the Visionfive if the GPU does what I hope it does.
The Raspberry 4 GPU is only 1W vs. 5W on the Jetson Nano!
I'm hoping for a 2-3W GPU on the Visionfive and then you'll need a heatsink for MMO gameplay no question about it.
Longevity is now crucial as hardware peaks, heat kills electronics slowly but oh so surely!
Edit: Do you have a URL for those 3.xW and 4.4W claims... Then I think we wont see 100+ but cache can still be larger so you can have 100 at 1080p and that is enough for mainsteam adoption and replacing all other computers (Switch, PS4, XBOX, phones and pads etc.)!
The future belong to those that compile!