I think I'd only opt for a cyborg hand if it could somehow be wired to transmit the sensation of touch. It'd be too weird for me otherwise, think I'd probably just go with a hook to freak out little kids.
If I did choose to go with a cyborg hand, though, a Swiss Army Knife style series of compartments (pen, knife, flashlight, scissors, magnifying glass, etc) hidden in the fingers might be cool. It'd be like Inspector Gadget without the wacky hijinks.