Many of the larger tablets (9" and up) have full size usb ports that act as hosts and a mini or micro usb that's slave only. If you see a full size usb port listed, you are pretty much safe to assume it's a host port (please check though!). If it's mini only, you'll need to check the specs for On the Go capabilty, and get an adapter.
Ooohhh shiney! is a good enough reason.
