I'd be very afraid to fry my eyes. I can't imagine strapping a bright display at 10cm from your eyes, for hours on end, won't lead to eye issues later on in life. I already feel strained after using a headset for an hour.
There are things that can cause strain. For example, items too close to you can be out of focus, the low FOV makes you move your head a lot more, and it has extra weight strapped to it, there is the heat, the motion, etc... But a well designed desktop setting like in the article avoids many of these problems.