On Tuesday Apple announced the iPad mini but the also updated the iPad with Retina display. This has caused some controversy as typically Apple only refreshes its product lines once a year.
I have spoken to several UK Apple stores this morning all of whom have confirmed that if you bought a 3rd generation iPad in the last 14 days you can take it back for a refund and swap it for the updated 4th generation when it becomes available. The only other caveat is that the iPad must be in “as new” condition.
This only applies to purchases made in an Apple store and other 3rd party retailers will have their own policies regarding this.