I think it will have an impact on tourism. Like you Scunner, we've never bothered how much we pay for a beer, or glass of wine as we're on holiday and don't drink that much anyway (well, most of the time!) and we've always considered it to be cheap enough in the past not to. However, with the cost of flights getting more expensive - we're out again next month, same time as last year and even booking our easyjet flights as soon as they were released have paid about £100 more than last year. If everything else is going up then people will start to look for alternatives. Times are hard for a lot of people and if they can afford a holiday abroad want good value for money.
Last October, after rather a hectic year for various reasons, we looked at booking a late holiday for a bit of sunshine. We ended up in Ibiza, a small resort we've been to before many years ago, lovely small hotel, spotlessly clean, friendly and helpful staff and just across the road from the beach. We paid £450 for both of us, flights, transfers and a week half board, all through Travel Republic. I booked half board because I was expecting eating and drinking out to be expensive out there, but was pleasantly surprised. It was certainly comparable with Turkey last year, if not cheaper in some places. It only got a bit expensive when we went to Ibiza town but that was to be expected. The flights were with Ryanair so I suppose we could have done it cheaper still if we'd booked earlier.
It's unlikely we'll be out to Turkey again this year and will look for other places to visit, probably Spain or Portugal, it's sad to see this happening because we still love Turkey but when you are on a limited income these things have to be taken into account.