Do what works then, if you get Qi capable hardware, get the corresponding cover if you feel the awesomeness and convenience make it worth it for you. (I found a white cover on amazon for $16 USD) For me, its the best thing since batteries (exaggeration) but to the next guy its a gimmick.
That "pillow" is likely a spacer to (at least what I think) make sure the battery doesn't bounce around to much, disconnecting or whatever. My sister's 521 has one to fill the gap between the back cover (curved) and the flat battery. My Treo has a similar one too.