Uuuuuh ... "just a hand" ?
The hand is about the most complex thing of the human body when it comes to mechanical finesse ... the arm part would be pretty trivial in comparison.
But it's just a hand. I use my arm for more things than I use my hand for.
As for the rest, yes, it's nice to see Marten grow some man parts. A Year-Ago-Marten would've just facepalmed and said, "Goddamn it, Clinton."
Just a note: no hand = no ability to facepalm.
Also, I'd really love to see how you're typing the above with only your arm. At any rate, for
most people the arm is mainly a jointed stick used to move the hand around. Having an arm without a hand is similar to having a construction crane that ends with the boom; it may wave about impressively, and can be used to shove and/or clobber things, but that's about it. That's not to say the hand is much good without the arm, either. Personally, I feel I need
both. YMMV
Also, thanks to all for the support of my point: the man who solved (or at least mitigated) global warming and world hunger and got their silly asses properly into space is most impressive, given RhD's (No longer RaD, alas) emphasis, for making a robotic rodent. Clinton, you zany freako, maybe you need beheading so you can finish putting your head where you've already tried to lodge it.
(And yeah, I realize there may be applications—perhaps robot hamsters scurry around the conduits of space stations, making repairs and cleaning before coming back to gnaw cage bars and run on wheels. Still…)