I'd be up for something similar, yet significantly different, to power armor. Perhaps a large, clunky golem-like thing that you can go inside. Even then, I'd prefer for it to be a one-of-a-kind thing. I'd also be up for the prosthetic thing mentioned. Would be cool to even have a prosthetic limb's abilities tied into an engineering skill of sorts. Having limb damage/compromising in the game could be a nice dynamic, with both magical and non-magical (dwarven prosthetics) means of "fixing" limbs.
EDIT: I'd really love to see dwarven airships or something like a dwarven battlespire. Perhaps even a hovering dwarven ruin one can turn into a home. I think it would be possible in TES VI, and I really hope they'd include them in a Hammerfell game. Since it's the last place (to my knowledge) left with dwarven ruins, I'd definitely like for the dwemer tech to get a send-off deserving of it.