I don't know if your dock would be very effective. That purple bar seems
awefully small and hard to hit, which is very annoying. And I don't know about other people, but I prefer to see an icon of the window, as well as it's title (and in that title, I think it should include the app the window belongs with). If I have a few windows open with the same title, I want to see a thumbnail of the window so I know exactly which window it is.
Your idea does not provide adequate window management/switching, something the Mac OS desparately needs.
All windows on the screen should be visible on the dock IMO, to make switching easier. And when you want to know if your desktop or dock is clean of unminimized or minimized windows respectively, you want to be able to see how many you have open (by hopefully glancing at the dock) and closing unnecessary ones. A purple bar, not only confusing, does not show you how many windows you have open, so you have no idea how cluttered your dock is. As well, by showing
only minimized windows on the dock, you are in trouble if you want to quickly switch to a window behind multiple open windows. Dragging and resizing just to get to something behind a window is not trivial and should not be the only way to switch (for apps that don't have a Window menu built in).
Your dock still looks awefully cluttered. There is no real organization. There are open apps next to stored apps, in between more stored apps, and it still does not address the problem of knowing whether an app on the dock is just open, or open
and stored on dock.
All in all, I still think
my dock is better and I would rather see my version implemented by Apple. The dock does too much, it needs to be simplified to just a switcher/notifier. Launching and storing is not what it should be intended to do, and I'll be very dissapointed if it does that in OS X 1.0.