ya this is a really cool toy, they are able to move the giant antennas as they please on the plateau and focus. highly recommend watching the video from the bbc article, shows how they assemble them at a lower altitude and then move them up the mountain on a giant purpose built vehicle.
I don't think this is so interesting to observe. I feel like... the scientists were setting up ALMA for so long they were going "Quickly! Just take a picture of anything! I want to finally see it!" We'll definitely be expecting a lot more cooler stuff in the very near future.