Here are the expected changes you should be thrilled about.
In Windows 8, accessing search, settings, sharing and connected devices is just a thumb-swipe away -- unless you don't have a touch screen. If you're using a mouse and keyboard, you have to move your mouse to the upper-right-hand corner, making it too easy to launch the charms-bar by mistake if you're scrolling or trying to close a window.
Windows 10 is expected to do away with the charms bar, replacing it with a settings tab next to the minimize button at the top right of each window.