It's been easy for us to think of 3D printing as something of a gimmick while the process has still been in its embryonic stage, but when news emerges about a 3D-printed car that is genuinely set to take to the roads as soon as next year, it's probably time to sit up and take notice. And we're not just talking about a one-off prototype here either, as next year is when this world-first is actually set to go into production.