You can't really beat Intel and AMD unless you're at least as good as supporting the hardware and peripherals and for as long. I can see Intel and AMD getting better at power use but I have a hard time seeing ARM ecosystem become as open as the PC one.
Worth a read:
Amazon is the most successful manufacturer of Arm server chips, accounting for just over half of Arm-based server CPUs currently deployed, while some chipmakers are also now betting on Arm-based Windows PCs.
This information comes from a report issued by Bernstein Research which estimates that nearly 10 percent of servers across the world contain Arm processors, and 40 percent of those are located in China, as we reported earlier.
But that total is beaten by just one company – Amazon – which has slightly above 50 percent of all Arm server CPUs in the world deployed in its Amazon Web Services (AWS) datacenters, said the analyst.
For a desktop, if you don't care about power and heat, then this will have inferior performance.
Nuvia had a core designed for server chips when Qualcomm bought them, and Qualcomm publishing benchmarks at an 80 watt TDP, tells me that their chip isn't going to be well positioned to compete on power draw, heat and battery life against next year's chips, especially without any sort of efficiency core at all.