That lap portion was VERY disingenuous, it wasn't realistic at all on the surface side. I posted up a video in another thread about how stable the surface pro is in the lap, she obviously exaggerated for the purposes of her video. On the magic keyboard side she looks like she's pushing down with her hands to keep it from sliding off or flipping over. In her example if she lifted her hands off the keyboard the ipad would have slid and/or flipped right off and fell onto the ground, you can't change the laws of physics. Honestly my IQ has gone down 20 points just watching that review, do people really watch this?
Edit: Here is a realistic video of the surface pro on the lap, and that's without even the added advantage of being able to fold it back at a much greater angle and also being able to tuck the keyboard under it. Note I'm pressing with my finger and the pen much harder than anyone normally would for testing purposes. I highly doubt the ipad with magic keyboard would survive if I used it in my video instead, but I also haven't been able to physically try it myself so can't say for certain.