Actually, I thought Palestinian Authority did not recognize the State of Israel either, in the same manner HAMAS does not, being the only difference that the Palestinian Authority is recognized by many governments around the world and does not opt for terrorism to achieve it's objectives.
Even if HAMAS disbanded tomorrow and all the gaza strip got disarmed, I doubt the government of Israel would abandon de Gaza Strip and give its control the the government of Palestine, Netanyahu is already accustomed to seize land, so he won't skip an opportunity as big as this one to take a slice of Palestine as big as possible and illegally annex it to Israel.
Exactly what Benjamin Netanyahu and almost all Israeli wants, is to annex all Palestine lands to Israel, it doesn't matter whether Hamas disbanded today or tomorrow, personally, I feel it's still the resistance of Hamas that has made it possible for all of Palestinian land not to be taken yet by Israel. I don't know why people have forgotten so quickly that if not for the fact that Palestines accepted the Israeli population after WW2 decades ago, there wouldn't be a land called Israel today.