Fujifilm's Instax instant film cameras are fun to use, but since the cameras are completely analog you get one print for every shot you take. Not only can it get expensive (a single picture costs about 50 cents to $1) but it's the only picture you get -- there is no digital version.
The Instax Share SP-2 mobile printer, however, lets you transform any photo on your smartphone or tablet to an instant film print on the spot. It means you can pick and choose what you want to print, edit your photos however you please with whatever filters and share them immediately.
At $200 (that converts to about £150 or AU$270, with UK and Australian details yet to be announced), it's not exactly inexpensive, especially compared with other compact photo printers capable of larger prints, but instant film and cameras never really were a cheap medium. And there is something to be said about the immediacy of it all that goes hand in hand with the shoot-and-share nature of smartphones (and, ugh, tablets).
The Share uses the same 10-print film packs as the Instax Mini cameras. Just pop open the printer, drop in the pack and close it back up. The list price for the film is $20 (about £18 or AU$30) for a two-pack, but can easily be found for less than $15. The prints are small at 3.4 by 2.1 inches (86 by 54 mm), though the actual image size is 2.4 by 1.8 inches (62 by 46 mm).