Got to use the new laptop for a few hours last night and I have some thoughts.
My main takeaway is I think the whole ARM on Windows could have used some more time in the oven. It's overall pretty snappy, with very good battery life, but I've had multiple hard crashes, and a lot of small oddities in between. For example I ran Cinebench 2004 for ARM, and for some reason only 8 of the core were loaded up, each at like 75%. Why? I dunno. I couldn't get it to load up all the cores, no matter what I did.
For gaming I tried Half Life 2, and it ran very well, even at 2880x1620. At least between the hard crashes. I also ran the Final Fantasy 14 benchmark on a loop for an hour, and thankfully that didn't have any issues. In fact, on battery, it only drained about 30%, so in theory there's about 3 hours of gaming battery life. Using Firefox it was estimating about 5 hours and 40 minutes of battery life, but I noticed I was using the X86 version. Curious to see if there's some battery life overhead due to emulation. On the ARM64 version now, so I'll keep an eye on battery life to see if it's any better.
ARM stuff aside, the screen on this laptop is absolutely gorgeous. Half Life 2 really looked stunning on it, and HDR video is really something to behold.
I'm rolling into my weekend today, so I'll be able to get a lot more time on it to see the ins and outs of how it runs. So far it's a mixed bag, but I'm mostly happy with jumping in as an early adopter.