I don’t really know of any bands that record video of all their shows and put it online. There might be some smaller ones out there, but probably none of the bands in the same league as U2. Audio bootlegs, yeah, there’s a few that do that today.
I don’t think the “we’ll take the pictures while you watch the show” approach would really work either. For one, a lot of bands already allow photographers to take pictures for their newspapers or websites as it is. So it’s usually not something people aren’t able to find online nowadays anyway if they really wanted them. On top of that, even if these were offered in higher numbers or were something of high quality, that’s sort of overlooking the point of why people take pictures in the first place. It’s to show others the pictures that they took and from where they were standing. Not many people are going to post a picture taken by Joe Smith from the show if it wasn’t where they were standing or whatever other reason they’d want to be showing it off.
I take pictures and record a song or two myself a lot of the time, but I try to find a healthy balance between doing it and enjoying the show. Even then, I noticed that it doesn’t really factor too much for me personally in being “in the moment” or not, mostly when I’ve compared the differences to shows I’ve been to where no cameras were allowed. As for others doing that, as long as they’re not blocking views or interfering with other people at the show, it doesn’t really bother me. I have seen some people literally film the whole thing though, or have their point and shoot ready to take over when their cell phone’s they’re holding in the other hand is about to run out, and those are maybe the only times where I’ll raise an eyebrow!