what's coming to an end in Oct-Nov is the distribution deal with the operators. Currently, operators control the distribution of iPhone in each country exclusively.
When October comes, iPhones will be sold everywhere, including Apple Stores around Europe.
That doesn't mean it will be sold on other networks. It will still be only O2 in the UK and Movistar in Spain - it just means you will be able to purchase it from other sources - but the only option is to subscribe a contract with that operator thru iTunes, during the activation process.