Actually, we have something close to that now:

https://www.kickstarter.com/projects/tiltfive/holographic-ta...

It doesn't use lasers though.

The tech is basically working, and they're ramping up to production this year.

And no, you can't just walk around arbitrarily, but you couldn't do that in the book either (you could walk out of range). Also, Stephenson didn't worry about just turning your back to the laser projector...