What is the best eink device out there now?
The Dasung Paperlike 3 13.3" E-Ink Monitor is good it is about $1300
Does it use the new color eink screen?
No it does not have new color eink screen.
How much memory does it hame. I have a large ebook colection.
The amount of memory is not stated anywhere on the web.
What are the most popular robot novels that have come out in the last few years?
I, Robot by Isaac Asimov is the most popular robot novels that have come out in the last few years
I think that came out a long time ago.  Anything more modern?
The Hitchhiker's Guide To The Galaxy
Yes. I think that had a robot as well, but that came out 20-30 years ago didn't it?