This is quite an interesting experiment, and a step in the good direction, which should and must lead us to the complete removal of domain names. Why are domain names bad? That should be obvious. The main symptom of domain names' inherent brokenness is that the law must patch it so that an unknown squatter cannot kidnap some domain, e.g. register "france.com" and ransom it to the people who are most qualified to clai…
But talking about hash-n-slash why it is bad. Just like domains have the issue of being kidnapped so would be the keywords. For example with the hash-n-slash you would never know where you will end up being when you search for "france". By giving search engine the liberty to direct me to a site I lose the ability to manually choose france.com when some SEO guy has made sure that #://france would lead of francegiggly.com
Same goes with every other keyword, we already have a keyword battle on search engines and it would be better limiting that battle to search engines only. If we push that to browser itself it would be just be chaotic and misleading to people who don't really understand domain authority.
Imagine this being done for pushing phishing website when trying to go to your bank's login page. I get it most bookmark it but many don't and new account holders?
Its just a proof of concept and in reality it has many constraints, the search engine and domain world isn't that broken yet that we need an alternate solution.
As much as its difficult to get relevant domain names its still not impossible to settle for something similar to what you wanted.