The modern Cyborg does not so much excel in having a prosthetic arm that does everything - that would be similar to promoting rainbow colored unicorns: these do not exist.
The modern Cyborg works with modern tools for fast and good results. He thus sharpens pens reliabily and well.
Here is how.
Of course one can spend all day theoretically analyzing grip options and comparing different options or, just do it.
It is intriguing to see recent surges of apparent ADL (activity of daily living) demonstrated with so-called "bionic hands" (including Otto Bock Michelangelo hand, iLimb by TouchBionics and BeBionic by RSL Steeper). For the most part, these are not a demonstration of a need to wear any of these hands.
There are people that realize that not all advertising really means the offered solution works. Hand transplants - as useful or useless as some of the new 'bionic' hand gadgets - are known to fail and some people take a while before they verbally and publicly admit that body powered hooks are not as bad after all. As Jeff Kepner said in a video interview - with a hook you know what to expect. The difference still is that 'bionic' hands can be put aside - whereas hand transplants cannot.
Stories like that makes you consider however just how much can be done without ANY prosthetic or transplanted hand. Just to get a feel for the functionality and to fully feel with the extremity.
Videos are at least somewhat non-negotiable, and therein lies their beauty. Conversely you will hate me for the simplicity of (at least some of) these. So below is a demo of actual ADL using the arm stump only. Any of these may be also carried out with a prosthetic arm, but in many instances they work a lot better with 'just' the stump. Old orthopedic surgeons used to say "the best prosthetic arm is the stump itself" and it seems that the extra time my surgeon spent on my arm to fix it up proper and neat was time well spent. I find that the stump he left we with is in fact useful - long enough and sensitive.
A while back, I was asked to come up with footage to document how my prosthetic hook would work (or not work) when handling an iron and when ironing shirts [link].
It was then a question whether re-design of an iron would help people with prosthetic hooks. I have no idea why they restricted the research for industrial design to hooks. After all, there are far more people that live with one functioning hand after, say, strokes or paralysis than there are amputees.
Since then I started to trouble shoot the situation myself and found that with my steaming iron (regular plastic body steam iron), (a) the grip that was made of hard plastic also slipped out of my (non-disabled) hand, particularly when I was not paying attention, mostly because using the left hand for me is still awkward, (b) the iron was heavy no matter what hand or hook I was lifting it with, (c) its plastic housing broke when it fell because it was not built to last.
Glorious moments in a bloke's life: Opening a vacuum sealed marmalade jar can be a real bitch. I do work out, and I have all the gadgets. I use knives to lift the lid. I use rubber mats to hold the glass between arm and chest. I use heat to expand the gas / air inside the jar. But not all jars give in. There are a few jars that stay put.
You know how to then get rid of excess frustration? Focus your frustrated thoughts around an imaginary candle. Got it? Are the thoughts floating around that candle? Good! Now blow the candle, blow hard. You see where your frustration has gone? See? Pffft, gone.
With that concept in mind I figured the best way to get rid of excess vacuum was to drill a hole into the lid. Pffft, gone.
What Otto Bock, RSL Steeper or TouchBionics always try to withhold from us are the bare facts of life, the profane tasks. But that's quite alright, I am sure we can get them up to date somehow.
I am not always wearing the prosthesis or keeping my stump uncovered to air it out. Often, some protective clothing or stump socks are helpful.
I was not able to fix the laundry rope one-handed or with the bare arm stump. So I used the hook for it and, no problem.
Hanging up curtains can be difficult with one hand but I found an efficient way to get it done. The main thing is to search outside the box.