[nardi]

Is there any reason this same technology wouldn't work with light? Wouldn't that be a phased light array?

[marcosdumay]

Electronics swithcing speed is the main botleneck to doing this with light. And there are hard barriers that makes this kind of device impossible there.

But different devices with the same results are fair game.

[sp332]

LTE (depending on the band used) can be 10cm down to 3cm long. Visible wavelengths are 300-700 nanometers long. That's about 10,000,000 times smaller!