I get the tactile sensation of a book is missing but seems such a small price to pay for all the benefits.

I disagree completely. I've found that I don't remember nearly as much as what I read on an e-reader, regardless of whether it's e-ink or LCD. I also can't take notes in a way that makes sense to me in the margins, and I don't give the feedback of actively writing notes either. Likewise, I find it much more difficult to flip through looking for things.

Sure, I can ctrl-f for something, but with a physical book I have an easily accessible index and can often remember roughly where something is, and it's much less hassle to flip through than an e-book. This is doubly true with textbooks.

Basically, the tactile experiences of having a physical book are what cause me to learn and remember (there's also been some other academic studies on this too), which is why I read most books anyway (especially when I'm reading non-fiction or a textbook). Why would I give that up?

entire library in the palm of your hand

More a distraction than anything else, honestly.

being able to change the font size or style, self illumination,

I can do both of these with a physical book

text to speach so you can "read" while doing the washing up etc.

Sounds awful if it's something I'm trying to study actively. Might work great for fiction (if you can avoid zoning out, which I often can't), but not so great for a textbook or non-fiction.