Great topic for dialogue, how long have you been printing your photos? I did this for the last time ten years ago, and then, for the test, I printed several frames from some smartphone, and I will already remember which one. It seems it was Sony Ericsson W900i, I hope someone remembers this strange phone here. So, the Prynt project is a case-printer for a variety of smartphones, the idea is extremely simple, they took a photo, and you can immediately print it. 
Why do this? A good question, on the project page it is not answered in any way. I happened to deal with a pocket printer LG, as a toy it is very good, it is also not bad for using with friends, at a party, took pictures, printed pictures, distributed to those present. The Prynt accessory holds only 10 sheets of photo paper, so you can only take 10 frames. The device works with smartphones Samsung Galaxy S4 and S5, the creators of the project have already collected more than 300 thousand dollars – it would be time to release the gadget. Connection takes place via the microUSB connector, there is a separate button for shooting, powered by its own battery.
I suggest you answer the main question – would you like yourself Prynt or not? The project page is here.