People thought we would never get to 12in wafers either so of course people will print microprocessors eventually.
Not if you need the thing to behave as "a solid thing". That is traditionally overcome with welding, but how will 3d printed stuff take to industrial welding? That's a major headache with current aerospace techniques already given the operating parameters the parts are subjected to.
You dont need welding in 3d printing, remember the process is additive so you can print a frame fully assembled. Aerospace people are looking at printing hollow parts which would lighten a plane and still retain the majority of the strength.
the possibilities are only limited by size and materials in my view
Chocolate 3-D Printer Arrives At Last
3D Printing, Now in Glass
It's a cliche to say it's going to change everything but I guessing it will be pretty close to it.
Bookmarks