Hi all,
In jQuery Mobile 1.4 (alpha release in week of July 15) we will introduce a new default theme. This will have a flat, more modern, design.
Just to be clear, it's true that we don't achieve a native look of any platform. jQuery Mobile is a cross-platform framework and so is our theme. We are very happy though that there are people who develop and share custom themes that mimic a specific platform look, so it's available if you want this for your web app.
So the new theme has nothing to do with the changes that Apple announced for iOS7. We already decided about this and started working on the new theme a couple months ago.
Cheers,
Jasper