Most users simply do not care what's going on behind the scenes with delegates and everything else, all they want is functionality.
This is true too.
However it does not bode well for DPOS, which essentially requires 'users' to actively vote, manage and decentralise the business they are customers of.
Ultimately I expect it to evolve into some form of voting vs. non voting shares/direct incentives for voting (Still be cheaper than mining) or something else...
Well, supposedly something like 50-60% of people vote in America, but even if you are a voter, the odds of you opening the wallet to vote are probably much lower than trying to accomplish another task at any given time....
The tabs should be ordered by usage. The most important tab would most likely be the page where balance is located, plus the ability to send money, view transaction history, and view address book, all located on the same page. The next tab in the drop down menu would be whatever receives most usage next, whether it's the exchange or something else. Even if 100% of people vote, the last tab would probably still be the voting tab.
edit: I changed the original post in the thread a lot to include my later thoughts.