The first focal point will be the so-called Green Line, which divides Israel and the West Bank, but the future boundaries are more likely to be determined by what former Israeli Prime Minister Ariel Sharon called "facts on the ground."
It may be easier to draw hundreds of miles of Israeli-Palestinian border than it would be to decide the future of a single city.
Israel is opposed to allowing Palestinians to return to Israel, a migration that would threaten the country's status as a majority Jewish nation, and it's generally accepted that few, if any, Palestinians will be allowed a "right of return" to what's now Israel. At best, Israel seems prepared to allow only a token number of returnees.
Israel, only about the size of New Jersey, has lived its entire life in a state of hot or cold war with its much larger Arab neighbors, and Israelis are reluctant to accept a well-armed Palestinian nation next door.