are you thinking glass which forms a window? as in, you can see the innards of the computer?Aluminum/Glass chassis, glass on the sides, aluminum on the frames/grill
if so, i highly doubt this as being an accurate leak because i also highly doubt Apple is going to sell a product which from the outside has visible circuit boards/ram modules/etc. (unless the internal modules were finished/polished as well?)..
or do you think more like the phones? glass but not windows to the inside.