Interesting article although I feel the timeline for a merger of ebooks and computers will be far less than 20 years.
As for the NatCh's comment about 3 years from a keyboard, I am still using the
Northgate/Avant Stellar keyboard I picked up over 20 years ago. It weighs about 5 pounds and has Alps microswitches under each key. It is a pleasure to use. When you figure out the cost over that long of a period, it is very reasonable.