Uh... you can put full color pictures in eBooks and have them display all those colors correctly if you have a mobile device with a e-reader app and a full color display.Going from paperback to ebook is different. It's still the same book and is more analogous to putting a CD you own on to your Ipod. Same data, different carrier. In fact there is a small deterioration - MP3 isn't as good as WAV files, and ebooks are in monochrome.
OK - MY ereader is monochrome !
E-ink is vital for me - shiny screened tablets don't cut it !