What will we be using, Chinese Yuan?
Depends if the Chinese Yuan is a standard for everyone in the coming time, it's hard but I won't rule out the possibility. The US Dollar which we commonly refer to as USD is actually a standard in the market given the strong financial status of the US and hence most countries compare their growth according to how they are doing against the USD.
or will we be pricing everything in Bitcoin?
No, I don't think there will be pricing in Bitcoin ever because there is a huge difference between assets and currencies, assets have value only until they can be traded for currencies while currency is what government recognizes as legal. Bitcoin's value is determined by how much fiat one is able to spend to buy it.
Pricing in Bitcoin is a refreshing idea and a great explanation of how USD might get removed as the primary currency for determining bitcoin's value by
The Pharmacist.