The Leica U camera concept explores modularity as an option to defeat obsolescence. The modular system allow users to not only update their hardware infinitely, but to build it to their liking at the onset. Using a quick locking mechanism, individual components can be released and replaced in a jiffy. This also means that photographers can quickly and easily switch between photography styles without carrying around multiple cameras.
https://www.kickstarter.com/projects/1403065126/obsidian-3d-printer-high-quality-sleek-and-afforda? The 3Doodler pen is a rather fun toy. I say toy because while it's an extruder, it isn't capable of industrial-grade printing. However, it's cheap,