This is something straight out of a Star Wars movie. You can talk to and interact with people far, far, away, like they're right in front of you. I can see so many applications for this, such as for the medical field, diplomacy between nations, and even for schools. If you told me when I was a kid that this would become possible, I'd have scoffed in disbelief.
But now, it's a reality. How cool is this!
Have a great day,