I wonder how far technology would have to advance and how long it might be before people actually choose to have a limb or limbs removed specifically so that they can be replaced with something more powerful or capable? 20 years? 100 years? Or would natural human aversion to losing body parts prevent this?
For folks with muscular degenerative diseases, I would think it would be a Godsend. If my limbs were wasting away due to some ailment, hell yea I would have them swapped out. Now if they could get ocular implants perfected (like Geordi LaForge in Star Trek - Nemesis), I would swap out my lazy eye in a heartbeat so I could have 20/20 vision (or close) in both eyes!