Rather than a just giving you a notification icon, it changes the background system bars (notifications and navigation) to orange. (pocket-lint.com)
You'll find the traditional Home and Back keys and a Recent Apps button in a persistent System Bar at the bottom of the screen. (laptopmag.com)
The bottom System Bar on Honeycomb swings in and offers some of the (usually) persistent top notification bar you'll be familiar with in Android on your mobile phone. (pocket-lint.com)