Windows10で「ピクチャ・イン・ピクチャ」機能を開発中のようです。

Windows 10 Anniversary Update is expected to introduce a tonne of new features and improvements later this summer. Microsoft is working on improvements for Continuum, Cortana, Action Center, and even the Start Menu for the Anniversary Update. With the Anniversary Update, Microsoft could possibly introduce a nice new feature called “Picture in Picture” for Windows