The market runs Windows, so it would entirely depend on how well Windows runs on them. If you’re buying an Apple chip to run macOS, you’re already getting the best deal out of Apple anyway.

Given the history of Exynos I doubt Samsung will ever make anything high performance. If you want high performance ARM, you’ll probably want to go for something like Ampère, like the workstation that System76 is selling right now.

The modern Snapdragons seem more than fast enough for most desktop use. They have PCIe capabilities so in theory you could just hook up a GPU and use them in a gaming rig. The most power efficient gaming rig could hilariously be a Qualcomm CPU paired with an Intel GPU. Qualcomm’s media encoder/decoder is also leagues ahead of the desktop competition, so streamers may get an edge there if OBS can take advantage of the hardware acceleration. Unfortunately, from what I’ve seen on reviews, some games don’t like to run on ARM. Performance is just fine (very impressive for laptop GPUs!) but without stability, you’re not attracting many gamers.

If Qualcom targets the desktop market, I expect them to go all in on Apple Mini style computers. Their Snapdragon chips inside those ultra thin desktops Lenovo sells pack a surprising punch and they’re more than good enough for most desktop use. Taking the fight to gaming seems like picking an uphill battle for no reason.

Unfortunately, modern ARM designs all seem to go the same route as Apple, with unified memory for both CPU and GPU. You can run the CPU on swappable DIMMs, but the GPU needs more bandwidth than that, so you’ll need to get soldered RAM. I was hoping LPCAMM2 would fix that, but Framework and AMD tried and couldn’t get their new AMD chip to work without soldering the memory for stable performance, so I’m thinking the days of swappable memory are coming to an end.