Although the Euro is coming close to being the same as a pound you have to take in to account the cost of travelling when deciding on a holiday destination. We are seeing a lot of people looking at a short channel crossing and then staying in Brittany to cut down on the petrol costs (and CO2 footprint). Also people are now looking for a more ecofriendly option instead of large hotels they are considering mobile homes and tents.
so in answer to the question yes it may be dissuading people from travelling to places further afield in Europe but not the destinations closer to UK.
Pierrej