I don't mean to be a party pooper, but I'd have thought anyone working in the field at that point in time would predict cell phones. Especially someone like Tesla who was so big into wireless technology.
What would have been more amazing is if he actually predicted the cell concept for handling wireless telecommunication.
See, you're speaking from a perspective of the world as it stands now. Wireless tech, to us, is so usual that we take it for granted. However, in 1910, most of the technology we now take for granted was considered nothing more than imagination or black magic. That's how crazy ignorant the world was. At the time, anyone "working" in that field - with any relevance - was probably 4 or 5 guys.
In many ways, Tesla
invented the field of wireless technology. Everyone else, save Edison, was just piggybacking his research and trying to take credit for it. Even Edison had to give Tesla his props when he was on his death bed, saying his one true mistake not respecting Tesla or his work.