Great question. We’re starting to see a lot of focus on video calling due to the current situation
30 years is long, long time in technology. Thinking back to 30 years ago even video calling seemed a long way off (particularly since most people had never even been on the internet at that point).
There will be a lot of focus on making it much more like being there rather than just calling somewhere. Perhaps 3D holograms will become a thing, or maybe virtual reality will get to the point where it’s unobtrusive enough that everyone will use it. Maybe it will interface directly with your brain. It’s hard to say.
I’d expect much clearer video and audio even in the next 5 years. 5G connectivity might mean that video calling is something you can do anywhere rather than needing to be at home in-front of a computer. I’d assume at some point camera technology will get to the point of capturing more depth and re-constructing a true 3D scene.
There’s likely to be a lot more artificial intelligence/machine learning doing things like removing backgrounds (like Microsoft/Zoom does) but in a much less obvious way. There’s already AI working in noise reduction/clearer audio. AI will take a much more significant role over the next few years.