I think it's a fine idea. I'm curious though about how it's implemented. The mirrors on a semi, box truck, or even a large pickup pulling a travel trailer, are pretty big. At first blush I'd think that any screen meant to replace them would also have to be pretty large. Where do they put that on the interior of the vehicle?
So I found a company name in the article and did a little digging.
https://www.stoneridge.com/mirroreye/
In a large cab there is a lot of room for the screen, especially on the passenger side. But it has to be creating a pretty big blind spot on the driver's side in particular. It's like a 6-inch wide A pillar. An interesting idea with a challenging dilemna methinks.