iPad versus e-ink
Real e-readers have e-ink on their side because I will never read a book that is blasting light at my face.
Unfortunately, latency is still a crippling problem with e-ink, and full color would be nice to have, but once these issues are resolved I’ll be a happy reader of e-books.
That said, let’s see an LCD device that has e-ink on the backside!*
* Yes, the idea is that obvious, USPTO. Strap a Kindle to your iPad and don’t grant the patent. ;)