Look closely. First of all there's a rigid barrier between the lower and upper seat. That means that fart gasses won't get through, unlike current seats where farts just spread everywhere around a person, so only the upper seats will be affected.
Second, the lady has her feet up, meaning she has enough leg room to do so. This is a big advantage because you can kick your feet up on your underseat baggage while you sleep or stretch your legs. It's much better than the current layout where you can barely move at all.
No offense, but I think anyone with a negative opinion of this layout is wrong.
The lady isn't choosing to "have her feet up," she is essentially sitting on the floor and forced into the L shape by the rigid structure around her. There's still incredibly little range of motion just like a regular seat, except now with the added danger of a much more difficult emergency evacuation, especially for people with limited mobility.
Also, I'm imagining that there isn't a wall right in front of her face, as this angle suggests. But rather, there is a bit of a cavity tucked up under the top seat. Oh, yeah... found an image. It does still look a little claustrophobic in there.
My biggest problem with the space is that if I had to sit with my legs out like that, I'd eventually cramp up and inevitably bang my knees on the chair above.
This is marketing meaning if this ever actually came to market (and it won't) they would immediately begin adjusting it to reclaim even more room causing cramping with each new redesign. People are very easily conditioned so years after this became a thing and multiple redesigns later people would only just be beginning to realize it has already happened and even then nothing would change because the general public won't do anything while a select few will complain and make no impact.