I do play fullscreen like that, but there's some people that don't and are too used to playing windowed, so this helps them out. It's just a good tidbit to know.
Edit:
Besides the whole process itself is not very hard or difficult to handle. It only takes like a minute to set up and less than that to revert. Once you do it a couple times it's quite a simple process. The problem is it has ramifications for not cleaning up after yourself so it's a double edged sword. Good reduced latency at the price you may mess something up if you're not careful. I think there will be people out there willing to take this risk.
Edit:
Besides the whole process itself is not very hard or difficult to handle. It only takes like a minute to set up and less than that to revert. Once you do it a couple times it's quite a simple process. The problem is it has ramifications for not cleaning up after yourself so it's a double edged sword. Good reduced latency at the price you may mess something up if you're not careful. I think there will be people out there willing to take this risk.