Interesting!
If I understand well, it means that when the suspension moves, the wheel moves slightly sideways 
Of course this displacement will be very small: if it is 30 mm for a 170° rotation of the rear fork when folded, then in normal operation for a 15° rotation of the rear fork, the wheel will move less than 3mm sideways. That’s about the same amount as on the Strida when you pedal hard 