The reason 48 fps 3D, or 2D for that matter, is a no go for CE equipment is that nobody planned for it. There are problems at every step in the chain from source to display. There is no BD format for it, current BD players wouldn't recognize it if there were, HDMI doesn't have tokens for 48 fps content (although it could transmit content with the appropriate vsync), and the displays don't know how to convert it to their native frame rate. There is also the problem that 48 fps 3D requires a bit rate that is higher than CE products have been able to handle until recently. There are still a lot of products out there with chipsets that can just handle 1080p60 2D.
Edited by Colm - 2/23/13 at 6:28pm