My 2 cents:
Online gambling may or may not become illegal – nobody knows, and none of us will know for sure until it actually happens, period.
The anti-gambling bill may be passed but it also may just be the usual once-an-year-wheel-greasing. What I mean is that some people want to get a cut of the profits and they will, in a form of lobbying (while they can). I just dont see how a few casino companies with over a billion dollars in actives would let this happen.
If it does – it will not be banned on ISP level. For example, child pornography is absolutely illegal, and yet the ISPs fail to block the content. What the bill aims to do is work with the banks and cut the gambling from its means of funding – no gambling related bank transactions. This would be very hard to achieve as there would be so many new payment methods available to mask the real purpose of the transaction…
Another though – with so many people gambling online it will turn millions of people into criminals, thus the dovernment could wire-tap, look into bank accounts etc. of millions of their citizens just as they would on suspect…