I've got one coming my way hopefully in next 2 months..
I kind of see it similarly to this review - a new category of device and not quite a 1-1 replacement of anything I have.
I have reluctantly owned Kindles & iPads since v1 of each, and don't particularly like either.
For me the iPad is always the 2nd (or 3rd) best device - if I'm seated indoors at a table or sofa, a MacBook is better.. if I'm on the go, a big iPhone is better.. if I am doing book length reading, a kindle is better. I can go a week or three without picking up my iPad. I find the OS annoyingly close to being a proper mini MacOS that never quite gets close enough in terms of multitasking/etc. It almost would be better by not trying to do so many things.
That said I find Kindles to be the worst tech product I regularly use, hands down. It's good for reading books in bed, thats basically it. But its so much better at that, I use it daily.
All the notetaking/highlighting/sharing functionality is garbage. Attempts to download/purchase more books on it are clunky enough I just wait til I'm back at phone/desktop. It also has the most bizarre ad targeting showing me content I would never read despite having nearly 20 years of my reading history.
I've even tried the Remarkable (v1) for a couple years as a work note-taking device.
So I'm hoping the Daylight solves the "3rd device" issue a bit better, but tbd.
Light computing, mostly for reading, plus some light note taking, touch & keyboard, better battery life and a screen that works outdoors.