While a bit of a stretch to what might be considered digital media, printers are a well used form of media within the design industry.
2D printers can be used for a fairly large amount of things within the design industry, mostly depending on what task at hand is. Whether it is printing out a portfolio, or simply printing out a physical copy of your work for an employer to hold on to, printers are mainly used just to obtain any physical copies of work. Printer may likely be used most by anyone within the photography part of design, as many photographers may print their work on an almost daily basis.
However, with the constant rise in digital storing capability online, many people are printing less physical work, as they can easily keep their work on a digital format and pass it round using email, or even create their portfolios online, allowing anyone to view it.
3D Printers however, are probably as commonly used as they have ever been (if not slightly more, due to how useful for various types of physical design compared to 2D printers. A 3D printer refers to various processes used to form a three-dimensional object through the use of digital programming and code. The printer uses a digital blueprint created online to gradually construct an object or device by layering thin lines of material (with plastic being a common source I have seen) over each other continuously until the material forms a three dimensional object inside of itself. The larger or more complex the object being created, the longer the formation process.
This form of digital printing often used to create physical pieces of design either quickly or efficiently. The objects printed may often be used by product designers in order to create prototype replicas of the designs to show their employers or to see if the design functions correctly in real life.
I highly doubt that I myself will ever find a situation of using a 3D printer within my work any time soon, but the use of 2D printing has always been something that I have used greatly for forming physical copies of work, namely for making my portfolios.