I'm a Marantz customer and fan in general but this sounds like snake oil. I found the below in a preliminary review over at Digital Trends while trying to figure out what "IMAX Enhanced" really meant.
As for what IMAX Enhanced brings to the table, we haven’t yet had the chance to try it, but it promises “a new level of audio and visual excellence.” Everything else we’ve seen under the IMAX name has been fantastic, so there’s no reason to expect otherwise here.
I know nothing of IMAX in the Home Theater space. Are they trying to take on Dolby?