Pictures are worth a thousand words, right?
So obviously it will change the look somewhat, no way around that. The extra ventilation holes are right next to the video card though, so it should help quite a bit with getting the hot exhaust out of the case.
The bottom filter is the same construction as the side filter, though larger and a different shape. It will attach magnetically to the underside of the case, part of which will now be steel.
Unlikely we'll offer solid panel options. Stay tuned for the feet.