Video walls are suitable and are used. There are no seams between the panels and realtime rendering is fast enough for moving cameras. All camera movements are tracked, a virtual camera at the exact same position renders the image which is then shown on the LED wall. The image outside of the panels will be masked with a seamless transition (biggest obstacle here is video wall brightness vs. studio lights). Delays are adjusted for.
The combination of the technologies is product of the last 2-3 years, but it is already used around the world and a major benefit is that there is no additional post production needed.
You can see how this works in a very small set here: https://www.youtube.com/watch?v=mhmYawxWfjE
And here you can see how the image moves when the camera moves: https://www.youtube.com/watch?v=6koVH1vmLp4
The combination of the technologies is product of the last 2-3 years, but it is already used around the world and a major benefit is that there is no additional post production needed.