A standard ToS prohibits most types of access; in many cases, a literal reading of a ToS would prohibit
any access (one ToS I read says that their site should not be accessed by "any method, automated or manual" (in the context of banning robots/scrapers)). They arrange it that way so that they
can demand that you stop talking to their server whenever they dislike something you've done.
The CFAA is a critical component in maintaining highly significant tech monopolies like Facebook. I don't think that SCOTUS will clamp it down. Computer access is abstract enough that it is hard to get a political fervor generated, and most people are able to use their computers without impediment, so they're never going to really care (cf. copyright, which is possibly the most widely violated law today, yet the function of which most people continue to remain completely ignorant).
The parties that are interested in these things are going to be large companies that are paying lobbyists to get stricter restrictions pushed through, not political grassroots mobilizing to reverse it.
As an example, last year Congress passed and President Obama signed a law strengthening the CFAA's restrictions by prohibiting the circumvention of "any technological control on an Internet website or online service ... used to enforce online ticket purchasing limits or to maintain the integrity of posted online ticket purchasing order rules".
Like many laws, at a superficial reading, this looks fine, but then we get into the details. What constitutes an "event" or a "ticket"? Is a restaurant reservation an event, and does one circumvent a technological control if they inform a user that a reservation may be available (compare OpenTable)? Is hailing an Uber an event that creates a ticket, and if so, how would this impact third party applications that interface with Uber in some way? etc.
Like copyright, the CFAA, in some form or another, is here to stay, because it is a major part in the legal force used to prevent direct competition against the entrenched interests/incumbent players. It's really hard to get a political upswell over abstract, rarely-deployed concepts (even then, they make a token change and the meat of the policy remains intact).
Health coverage is a much more pressing abstract issue that negatively impacts a much larger percentage of the citizenry and we still can't find a way to agree on that, I'm not optimistic about copyright and/or network access.
It is possible that the CFAA will go away in many years after there is much more cross-generational technical awareness, but I'm personally doubtful. Would someone have been having the same kind of discussion re: copyright in the 18th century, as legal frameworks allowing people to own information emerged?
The ability to eval a ToS into federal law and get people sent to prison for it will probably go away, but the ability of a site's owner to pursue someone who won't quit asking their server for information in an undetectable-server-side, non-disruptive manner probably won't.
Disclaimer: I'm not a lawyer.