I probably won't use a web browser which does not support flash or online video playback since I use flash and online video for listening to music online, or watching videos.
I might use it if it is a mobile web browser like Opera Mini, but won't use it if it is a desktop browser like Chrome, IE, Opera, etc.
Indeed, it would be good for the classroom where people listen to the teacher speak, and take notes, but YouTube now has a lot of online video tutorials on learning how to do stuff on a PC like computer programming, fixing a PC, word processing, and learning about PCs.