So where the fan is now, there wasnt a bigger heatsink before?
If those are the performance videos with the extensive passive cooling, no. If they have a fan in the way of heatflow, dubious, it would have to be tested on actual hardware without the fan running.
The surface 3 has a very non-functional cooling solution.
The 8750 has a little higher boost frequency, but is otherwise the same spec-wise.
The 8500 has lower frequency.
The 8300 has lower frequency still, and lower memory bandwidth.
It would however have to be better clock-for-clock to have any meaningful impact.
Getting the engine to run faster is cool in other cars, but here might heat up the axle fluid, so you are left with something you could never use, or can't use to its potential.
Unless magically top end performance is leaner on the 8750 than the 8700, GPD may end up delivering surface 3 performance unless a fan is running. People will not be happy with that. Because fanless operation was promised, and there is no money on the table to do it right.
The graphics part is rebranded, so no improvement there.
Sell people a dream and people dream with you, deliver below promise, and people get annoyed and angry.