Honestly I think it could be worse. It's currently around £1:$1.23 wholesale. Considering US product prices are marketed without sales tax (from what I understand) and U.K. VAT is 20%, we're looking at closer to $1:£1 for Apple products. Which means the base rMBP could jump from £1000 to nearly £1300.
At least, that's my fear.
I was saying that a few days ago also as I have money laid away for a new MBP for a year now which I don't think is going to be enough and with forecasted rate collapse projected beyond the 1985 lows of £1:$1.05 - probably worse I think I am going to have to suspend notions that I will have enough for a new MBP or frankly anything else imported. (which is pretty much everything). Well done Britain this is a jolly old place to live now.