[citation][nom]killerclick[/nom]This will never catch on. By the time this becomes available we'll already be wired for retina displays with virtual controls.[/citation]
The concept is there, but remember people use different technologies for different purposes. i.e., wireless LAN vs Cable Based, Satelite technology, Radio Technology, Microwave, etc... and the list goes on.
I'm not exactly sure what you mean by "Retna Displays", but that is a very intrusive technology if I'm understanding you correctly. I do not know many people who would be willing to go in and have a computer put into their eyes as such. Many wish for the days of Matrix, and the days of full automation, but a Dattoo looks like one step to get there.
Just an added thought : They will be like clothes. Next we'll start to see companies like Nike, selling a specially designed Dattoo.... And later... of course MS, Apple, and all the other companies of the world might design some type of branding Dattoo. (You may end up using one at work... where you must keep it on at all times with their logo on it....)....