Blu-ray discs are supposed to store 25GB. HD-DVD may stretch up to 45GB. Big deal. The next new storage medium, holographic storage, may be able to cram 300GB onto one inexpensive disk.
nPhase is hoping that its first consumer product will be a postage stamp-size card that holds from 4GB to 8GB (no customers for this product have been announced yet). After that, a business card-size piece of film could be produced that holds 500GB.