50 years ago, the concept of portable communication and information devices was the domain of science-fiction. Not only has real technology since done that, but out-striped the technology previously only dreamed of in that medium.
As I pointed out in my previous post, the technology already exists to directly control holograms through computer-enabled coding and algorithms. Given another 10 or 15 years, you could fit a competent A.I. into a small microchip. It's not going to be quite the Holodeck, but it comes close.