Phones already do a lot of processing of images to make them look better than what a digital camera would capture out of the box, and Kodak already makes such a dock, it's called the Kodak dock: https://www.kodak.com/en/consumer/product/printing-scanning/...

$200CAD. Ouch.

A little cheaper than an Epson EcoTank printer, for sure (about ⅔ the price), and likely much better prints. But it’s a single-purpose machine, not something that can print off _anything_ in colour on Letter/A4 sized paper.