Maybe it was a Remarkable [1] ? A new version is coming out soon.
In the tablet vs laptop for travel I'm going to go laptop every time. So laptop + Kindle.
And to another comment, yes the Kindle is small and light but it's something else I need to keep track of so I tend not to bring laptop + tablet + Kindle. (And I've never been able to make an iPad work for me as a laptop replacement.)
Really tablet is just crappy movie watcher or smaller webpage reader. Having all this was good since on that trip my SSD de-soldered itself from my motherboard on my Laptop, forcing me to use USB Sticks and turn it into a $3200 chrome book.
I basically equate the kindle to a charging or backup set of wireless earbuds in weight.