Everyone asks that but yes, you get used to it. There is also a built in utility to hide pixels behind the bezel so that each screen blends together without strange offsets.
If you just have the one monitor, then you see very little in your peripheral vision. With three wrapped around you, you have a huge view and in an MMO game, you can move your action bars and status bars to the other screens so they don't get in the way of your character.
Once OLED screens are available, then I can replace all three with one bendable screen.
Gaming obviously, but also productivity. I convert documents from one code to another and so I need to have both open at the same time.