Kosovo declared independence only on territory that they controlled (with the help of UN peace-keepers already in place). Also, 90% of the people of Kosovo were Kosovar-Albanians (with only a 10% Serb minority). Except for the local policing allowed by Israel in the West Bank,Abbas and the PA do not have any control over the territory he is claiming for a state, especially not Gaza. And, with the settlements in the West Bank, there would be a large minority of Israeli Jews living in the new State of Palestine.
Egypt to hold parliamentary election in 2 phases starting Oct 18-19 (Reuters)
from the article: PA official: Arab states to attempt UN-forced settlement freeze