Options such as to make carets stop strobing, disabling mouse-over effects (i.e., the graphical change in a button on a mouse-over etc) and any other options you think could be useful to a niche audience.
It’s very useful, because mouse-over effects and the incessant strobing of a caret can be very distracting. Plus, it feels less creepy when it doesn’t appear the website is watching your every mouse-moves.