Most EULAs cannot validly bind consumers to future as-yet-disclosed terms.
As above, in this specific situation, where you are agreeing because that is the only way to effectively remove the software, i have trouble seeing any court holding you to those terms.
If you were trying to get around agreeing to the license but still using windows 8, sure.
Going to court at all is a loss. Why should I have to risk having to pay for a lawyer and take time out of my day to convince a judge that I shouldn't be bound to the terms.
You can always be taken to court, they just don't often take you when they are going to lose. Since that is, here, independent of whether you agree, ...
As above, in this specific situation, where you are agreeing because that is the only way to effectively remove the software, i have trouble seeing any court holding you to those terms.
If you were trying to get around agreeing to the license but still using windows 8, sure.