Sooner or later the Bitcoin will be accepted by several big players.

Still, I think that it will take some more time because there are still some unclear issues in the accounting system of a firm.

The current accounting system of all the companies is built on FIAT currencies, which, at the present moment, have a specific traceability.
Because the crypto-currencies are not financial regulated yet, it is quite complicated in some countries to include and declare properly in the accounting the crypto transactions.

Still, for the benefit of all of us, let's hope that the Bitcoin will be accepted very soon for payments by several corporations.