Avevo letto già in passato che quella funzionalità deve essere supportata dall'App, e qui ne trovo la conferma:

Hands-on: Samsung Galaxy Note 10.1 (Quad-core Processor 1.4GHz; 10.1-inch display) - Notebooks - CNET Asia

The other addition on the Note 10.1 is the "Multiscreen" feature, where certain apps can run side-by-side in a windowed mode. It works pretty well on a 10.1-inch tablet, which makes you wonder why it hasn't been done before. It certainly gives the device a multitasking dimension that isn't native to the Android platform. The downside is that the list of supported apps is rather short at the moment.