Yes, http://lamborghini/ is a valid URL
lamborghini.com
lamborghini.com
$ dig lamborghini
...
;; QUESTION SECTION:
;lamborghini. IN A
;; AUTHORITY SECTION:
lamborghini. 768 IN SOA a0.nic.lamborghini. noc.afilias-nst.info. 1000002525 10800 3600 2764800 900Here's a twitter account that alerts you to new TLDs: https://twitter.com/newgTLDannounce
lamborghini’s server DNS address could not be found. ERR_NAME_NOT_RESOLVED"
In other words, valid URL != reachable URL; http://localhost/ is also a valid URL.