First- how exciting that you are getting a new device!
The warranty would only be in effect to replace the case you currently have and is not transferrable. The warranty is specific to the item originally purchased based on the proof of purchase submitted.
Make sure to register for the newsletter on case-mate.com so you can keep up to date on the latest promotions and the new case styles as they are launched. We know you'll find one you love for your new device!