The two countries agreed to establish diplomatic ties and re-open their borders.
VOA: standard.2009.10.12
Its expansion from 15 members to 25 should create pressure for making the EU what it always should have been--a vast free-trade area with openborders and, for most members, a common currency.
Were the Armenian-Azerbaijani and the Armenian-Turkish borders to open, goods would flood freely from east to west, lowering prices and increasing supply.