The latest Consumer Electronics Show had a toy helicopter run with BRAIN WAVE POWER through a cuff wrapped on one's head.
In 20 years we may be ABSORBING books from brain devices and reading with our eyes may be totally unnecessary. Our eBooks and stored collections of today may be like the Commodore PC and /or the TRS 80 of 1978- and all their related files and software.
Our large collections of DRM stripped eBooks will be like papyrus books - so much dust without any value.
See this book:
http://www.amazon.com/Future-Mind-Sc...re+of+the+mind
The other reason NOT to collect eBook files is that in 40 years most of us here today will be DEAD.
I still remember folks in 1930 collecting 78 RPM's for the miracle of that year: the RCA VICTROLA. All those 78 RPM's and the Victrolas are DUST today and ALL the collectors I knew then are all gone and forgotten. Today I stream my music from a PC to a radio in another room. In 1930 no one would have believed that would ever be possible. Even Sci-Fi books then did not IMAGINE it.