In my own opinion, I doubt if the volatility of bitcoin can be really kept under control. In a decentralised setting where is no control by the government, it is very difficult to control the market value of bitcoin. I believe with time when those company realised what they are loosing by not accepting bitcoin, it is then some of them will start accepting it.
It will be felt the same way how some user's now regret that they didn't believe at btc at first. Bitcoin volatility can't be controlled. Its volatility and applicable on increasing makes btc moee interesting.