I own both Remarkable and an the same size android eink tablet which I ordered on kickstarter. I use my remerkable tablet almost everywhere from reading and annotating PDFs to making excessively complex calculations for my PhD and sending them directly to my supervisour. The best part that I can just lay on the bed while I do so ;)

I thought it would be great to read online articles as I read books on remarkable, check email and etc. so I ordered another Android eink tablet. It was a great purchasing mistake which I barely use today.

The morale is that eink screen is very limited with it's refresh rate and lack of color making software as significant as hardware.