Even if you can print all the structural portions, there's a big problem printing electrical components e.g. motors, and then an even bigger problem printing c

Even if you can print all the structural portions, there's a big problem printing electrical components e.g. motors, and then an even bigger problem printing control electronics... Although, I think if they end up able to print robust, ready-to-use metal components with reasonable strength (say strong enough for a bicycle frame), that would be a pretty good leap forward. The base tech of what you can do on a desktop doesn't seem like it would quite get there today though.