I may be hugely misreading the article, but when it says "The mouse will be anchored to that position and the mousemove events are going to set a virtual position" and "Everytime the user moves the mouse ... the cursor is moved to the center of the screen" I find it difficult to interpret that in any way that doesn't effectively mean that a website is able to move or lock the cursor. I admit that I use cursor and mouse interchangeably, when they're actually not the exact same thing, however.