Toshiba has passed along some concepts for possible uses of that new 0.85 inch hard drive: the wrist PDA (seen yesterday on Gizmodo); the integrated headphone MP3 player; the digital wallet/electronic key; and the information specs. None of them are real, of course, and they all look sort of corny, but as usual, speculative items of the future continue to be intriguing (despite the preponderance of blueness that makes these all look sort of cheap).