As the title of the post says, as of today domains ending in .xxx are available for sale to the general public as of today.
Here’s an article on the impact of the new domains.
They’re more expensive than regular domains, starting at $80 per domain name, and can only be purchased from approved registrars. The higher cost comes from add-ons that are automatically built into them: automatic daily virus scanning and other security features that are built into them.
Most businesses aren’t interested in building an adult-themed website, but many companies are buying the relevant domain for their business to tie them up and avoid someone purchasing “yourcompany.xxx” and forwarding it to a porn site.