Given the current political climate, there's no way I can make a comment like this without it sounding political, but here it goes...
It seems a shame to me that technology like this is not available to all amputees. I can only imagine the frustration I'd feel if I lost an arm or a leg and couldn't afford this, and had to settle for a "dumb" prosthesis instead. And I can only imagine this problem getting worse in the future, because this type of thing will never be able to reach the economies of scale to make it available to "ordinary" people on their own.
In my own country, to my knowledge, this isn't yet an issue, but as technology progresses and with budgets getting tighter it wouldn't surprise me if it becomes one in future.
Bionic prosthetic limbs like this is very hard to control, that's why it's newsworthy that a man can climb 103 stairs like this. To be able to use something like this requires lots of training and calibration, so it's not easy to mass produce them (yet).
And all that training and calibration requires highly-specialised workers to be able to help you. So it's more than just the cost of the device itself. Even if you could mass-produce them, I imagine they'd still need a lot of tailoring to the individual.
I actually saw someone using a motorised prosthesis for the first time recently, and it was very impressive to watch. I'm optimistic for the future, I just hope everyone who needs such technology can get access to it.