Other commenters gave good reasons, and here are a few more:

- If you like long books, an e-reader is much lighter than a tome. Not only more portable, but also easier to hold when reading.

- When lying down you don't have to fight the cover 50% of the time. Easy to read one-handed too.

- The new ones are water-resistant.

- You can have multiple books available, in case you switch it up or just finish them quickly.

- Search feature.

- Built-in bookmark.

- Time estimates until end-of-chapter and end-of-book.

- The e-ink screen doesn't feel like a screen. Not really a plus on top of paper books, but just because you mentioned.

I still read physical books when they're gifted or the medium requires it (House of Leaves being the latest example), but otherwise I'm 100% on e-readers. Previously Kindle Paperwhite 6th Gen, and since a few weeks, Kobo Clara BW.