You can even take advantage of it at some kinds of talks. If you assume some percentage of your audience has a device with internet access, give them some online supplementary material, or demo, or interactive data, or something similar to accompany your talk. There's a lot of nice stuff you can do on the web that's better than powerpoint slides.

I also tend to find that, at academic conferences, better questions come from people who're following along with the accompanying paper during the talk.