Would it be possible for the Bitcoin developers to agree upon and implement something like a stock split for Bitcoin. Stock splits exist because as the price of a stock goes up, the average laymen investor sees the stock value and thinks "that's too expensive." Stock splits are good for investor psyche as it lowers the barrier of entry for the average investor.
This is an issue of human semantics, or the way we use words to describe value. You don't need to change the protocol to change the semantics.
There are other issues that may need fixing far in the future, such as when the deflationary nature of bitcoin causes the satoshi (the smallest possible unit) to become too unwieldy to use in everyday transactions.