Meh, the stupid, ignorant and nutty 52% voted them out. Proof that direct democracy is an asinine idea.
This will do serious damage to the UK economy as corporations who set up shop there to trade with the EU suddenly can't trade freely with the EU. They'll abandon the UK and this will do bad things to them economically. Leaving the EU was stupid, and they'll slowly become aware of that over time. And then they'll blame someone else... as ignoramuses usually do.
As for shopping in the UK, keep in mind that it takes a while for exchange rates to adjust on the consumer level, so shopping now with credit card will probably not save you a lot, yet.