Redesign Windows Phone Search
As great as Windows Phone is, there are some features of Windows 8 which I would love to see on Windows Phone.
Of course if you start searching you will search trough all the apps:
If you swipe from right to left you will see this screen:
And if you, for example, tap on the IMdb icon and type "django" you will see this (the black overlay exists in every app if you are in search to give a consistent look, like Windows 8):
If you would press search while you are in the IMdb app you will open the last screen.