[tekchip]

This sort of thing is a dang nightmare. Perk your mouse in the wrong place or scroll and stop at the wrong place with your mouse over the page and all of a sudden you're not reading what you were reading. This is happening all over the place on the web and an apps. Sometimes it's moderately useful like this looks like it could be but sometimes it's just completely superfluous.

[nayuki]

Agreed, and I'm not the only one to think this. The hover previews are SO DISTRACTING because I move my mouse around when I read an article, and I also like to select text to visually maintain my reading position. I have accidentally clicked into the previewed link quite a few times before, forcing me to hit the back button to compensate.