That's a feature you may well need, as quoted battery life comes in at 3.6 hours when streaming from a phone, and just 1.5 hours in standalone mode. (androidcentral.com)
The core apps like mail, contacts and such won't work in standalone mode with just the tablet, meaning you'll essentially need a BlackBerry to use the PlayBook. (gigaom.com)
Considering that Gears of War introduced the gaming world to Horde mode in its sequel, the need to crowbar it into the story is unnecessary, with the game featuring a full standalone mode for fans to enjoy. (wccftech.com)