My dad and I both saw this news so he wrote me an email saying, "get me a bike!"
We spoke to his physiotherapist, who said sure, he can use the stationary bike at the home. He used it today for the first time. Then he got up and walked without a cane or walker and said he didn't feel off balance at all. All I can say is holy shit. He hasn't walked unaided since he was diagnosed nearly 4 years ago now. It's a temporary thing, but it's freakin' cool.