Highly speculative even by domainer standards Yes.
Completely worthless I would say no. There has been over the years the odd sale in the $xxx range and at least one dispute under New.net's "Model Domain Name
Dispute Resolution Policy". The domain was sex.shop (sex.shop.new.net). I mention this because someone (the complainant) felt this new.net domain was worth the trouble and expense of filing a dispute.
http://www.arbforum.com/domains/decisions/114371.htm
New.net domains work in short form if the browser is enabled with the new.net plug in or if the user is using a partner ISP. The plug in has a fair amount of distribution since it was distributed along with popular "free software"
Personally what I find interesting is the new.net .travel and .xxx extensions. Why because if a computer has the new.net plug in installed the new.net version will resolve over the version in the DNS the computer is using, and that has profound implications for the .travel and .xxx ICANN TLDs, given the number of computers with the new.net plug in, if and when they are approved. As for how I tested this it is on my site:
http://www.finee.com/travel_tld.htm
Basically I set the DNS to resolve using the new root ( an alternate root that also has a different .travel TLD) and then installed the new.net plugin. The new.net version won out.