This conference as well as UN resolutions won't make any progress in this situation.  And there are three main reasons for that: Arabs claim Jerusalem as their capital - however it has never been capital of any state but Judea and later in early Middle Ages - Jerusalem kingdom of crusaders. So historically it is the capital of Israel. Second, Arabs declined few times  offer to create 2 states during the last 30 years. Third, it is time not to call Palestinians only Arabs - people of Palestine are Jews, Arabs, Armenians, Druz, because Palestine is only a geographic region not a state. And last, the reason of conflict is not land, but religion. Arabs Muslims do not want to tolerate different religion (though their religion grew from Judaism and Christianity) in the heart of Muslim countries and therefore they will do everything to annihilate the State of Israel.