Not interested unless there is a reliable fanless mode (or no hardware fans at all). Until then, I will certainly stick with the Macbook Air for the peace and quiet.
Also the single threaded efficiency is really bad:
M5 - 12.8 Points per Watt
Qualcomm X2 - 5.83 Points per Watt
This is like more than twice as worse as the M5, really embarrassing given the lack of the x64 instruction set compatibility burden.
Overall not a terrible chip, but bad single threaded efficiency and the presence of annoying fans will kill it for a lot of people.