The XXX extension will have no affect on adult Dotcom websites; adult Dotcoms will remain unchanged. Furthermore, with so much adverse publicity - including threats by Governments to block XXX country by country - many will look to avoid the XXX webspace completely. For those compelled to reserve domains defensively, it's likely that anonymity will be required as names get set as Unresolvable and/or Unknown. The outcome? Perhaps a mass of "For Sale" signs by speculators looking to offload their XXX investments.
All ICANN has done here is to openly advance fragmentation of the Web and encourage people to find new ways of making the most of their surfing experience. The result is that Internet users are now bypassing ICANN to create their own unique, memorable and personalised range of brand new Dashcom Domains and TLDs, totally free.
Sites such as Dashworlds.com now provide brand new Dashcom (not Dotcom) domain names. Dashcoms are addresses in format "travel-com", "hard-ware", "stock-market" (and of course any XXX your heart might desire). Totally outside the realm and control of ICANN, Internet users can create any domain or TLD in any language, instantly and at no cost.
With users and members in over 90 countries worldwide, resolution is via an APP; although new ISP Links are available to make this unnecessary (ISP Links that are also available to ICANN).
Having just one Internet floating in infinite cyberspace is like saying you can go anywhere in the USA as long as you only use route 66. So now, just as in the USA (and everywhere else in the world) the Internet has more than one option.