Yeah, really. This thread is 6 years old.
And this topic comes up periodically. I'd like my landlord to accept bitcoin, Walmart, Walgreens, and Starbucks. Then we will know bitcoin has arrived.
I think the really big companies might be among the last to accept Bitcoin - simply because they are most exposed to governmental regulation. However it doesn't mean that Bitcoin can't arrive without their acceptance. Even if Bitcoin use would be limited to private market activities, this person-2-person use alone could make Bitcoin highly popular and credible as a currency. Rent payments in Bitcoin are a significant contribution in that regard.
For Bitcoin's sustained success I think it is essential that it will be accepted by the primary sector. That means agriculture and commodities. If that is achieved on a b2b basis, then Bitcoin will be unstoppable, because it will be the foundation for a closed loop Bitcoin only economy. Fiat conversion will become obsolete. That is what I hope for.