What has become pattently clear in the pain and cost that it has taken to expell the settlers from the Gaza strip, is that there is no way in heck that Israel will expell larger groups from the major WB settlement blocks. Nor will the public support it. On the contrary, Israel will unite behind "greater Jerusalem." Chances are, given the images we are seeing today, that the political pressure on Israel to try to remove the major settlement blocks will be minimal... at best, just lip service to appease the Arabs.
As I have stated before, my guess is that Sharon is trading Gaza for Jerusalem. He knows that much of the WB cannot be held re: demographics. He also knows that, after the pain of Gaza, natural growth and expansion of the major settlement blocks will essentially "fill in" the "Israeli side" of the security fence, and that these populations will not be moved, the Israeli majority will fight for them, and the world will not hole-heartedly ask.
What Sharon is gambling on is that the Arabs are so detached from reality, so uncompromising, that they WILL NOT make a legitimate offer for peace right now.
Think of it. How could Sharon lose this gamble. Easy. Abbas could offer a Camp David like agreemend, token right of return (Israel decides who gets in, or some compensation scheme with proofs), a part of Jerusalem is divided, and REAL security guarantees - for example, 3 party control over Pal Arab borders - Israeli, Pal Arab, and International - all working together, including in the Gaza airport and seaport. Maybe bring in Jordan to offer assistance fighting the terrorist groups, and a pledge to fight them if they attack Israel.
Now, he won't do this. And if he did, Israel could simply say... we have no reason to believe you - hold a referendum on it, spelling out to your people what your compromises will be - how you will actually disarm terrorist groups and KILL those who attack Israel... how you will share security on the border with Israel... how you will, for all intents and purposes, give up the right of return - give up the goal of the destruction of Israel. Because, since you, Abbas, have not shown an ability to control anything, we won't believe you unless a strong majority vote this plan through. We'll have a similar referendum on acceptance, too.
Clearly, the Arabs would never accept this plan.
And so the major settlement blocks will grow, and, within a generation, they will be annexed to Israel, while much of the WB will be renounced. The Pal Arabs will have lost Jerusalem. Oh, they can war if they want, and will be responded to in kind... but it will be over.
Sharon is gambling on the Pal Arab inability to compromise or control their Jew hatered. It looks like a sure bet.