The bitcoin it self is a revolution in the world financial system and at that what ever has to do with it is all revolutionary in features for a company to pay it tax using bitcoin it shows bitcoin have indeed gain the recognition of the general public and even cooperation. Great news there looking forward to more companies adopting this medium also.
Companies are govern by law, they need to follow as the government grant them permit to operate.
For them to adopt bitcoin, the government also needs to regulate exchanges which is use for exchanging fiat to BTC, or BTC to altcoins, etc.
With government regulation, companies will not doubt to use this even if it's a new technology, maybe we can solve the volatility issue and this will be widely used as a payment system, investing also would be attractive as the pump and dump will be reduce or eliminated.