Terrible link, the actual reMarkable website is much better.
It's a very niche device but I've owned mine for nearly two years and am a big advocate. In some ways, the first model was proof of concept. Excellent hardware and writing experience, but the early versions of the software were horrible, and the device itself is very ugly. The software has improved dramatically in the time I've owned it, going from horrible to bad, then to almost acceptable, and now it's decent.
I'm happy to see the company is doing well enough to make a second generation reality. Looks like it will be an overall improved experience, with a magnetic marker, a slick-looking device and overall incremental improvements. I'd like to see some kind of trade up program though, it's expensive (and 50$ more for a marker with one extra sensor is ridiculous) and I can't justify paying that much for an incremental upgrade.
My only concern about the new specs would be the thickness, or rather the sturdiness. The first generation is thick by modern standards, but it's very sturdy. I've dropped the device, I've dropped the bag with it, I've bumped into things with it - not a scratch. Very refreshing in the age of fragile devices. Hopefully the rM2 doesn't sacrifice much sturdiness to be thinner.