As far as I know, the graphics performance of MTL 6+8+2 28W is about 30% better than 780M in synthetic benchmarks and about 10 to 15% in gaming. Gaming depends on driver optimization. Power consumption is also slightly higher than 780M but by a small margin.
I’m not sure about the real ROI in buying an ARM laptop and using some sort of emulator to run your applications. Not to mention the effort it takes for you to test / debug various pluggins to see which ones actually work.
The performance and battery life of ARM / X86 / Apple laptops have become increasingly similar in the last couple of years. With intel finally moving to EUV process, this trend is only going to continue.
When Apple first launched M1 laptops, there was no single x86 laptop that could compete with it in battery life. You needed an M1 laptop if you need 10 hours of battery life. Now we have multiple thin and light laptops from Intel and AMD that give over 10 hours of battery life.
Qualcomm can not succeed in PC market without having some strong differentiating features that x86 can not achieve at least for a couple of years.
7840hs was launched in January but was a paper launch. Laptops based on that started selling just couple of months back. I’m not sure about this specific test, but in general, MTL igpu beats phoenix igpu by a decent margin.