re: 21st Century
The operative word is "realtime" in the 21st Century.
Yes indeed, Robert!
Robots on the Moon, on Mars, on Venus on Earth-Sun's L1 (why not!) on asteroids, on Jupiter's and Saturn's moons, etc...working and sending live pictures all the time!
That would be tremendously exciting !
Exploration all the time, new landscapes every day, from around the edges of the solar system!
And, well, are humans needed?:-)