Meh
Web ads are cheap and ubiquitous, and tech like this isn't going to significantly improve click-through rates. Getting an ad to nudge over by an inch on screen, or whatever ridiculous gimmick they add, isn't going to change that.
And although people are less worried about privacy than they used to be, I'm pretty sure people would flip out if their web browser turned on their webcam, without their knowledge and/or permission, in order to observe their reading and surfing habits.
This tech seems dead in the water. Like most of what Wired has reported on for the past 17 years or so.