I'm not saying that there won't be any issues, but given that there is obvious demand for ~$200K TLDs, I wouldn't be surprised if someone started to push it.
And (currently) putting things into the Awesome Bar either a) detects a domain and goes there or b) goes to an intermediate step: the search engine. I'm pretty sure some browsers do an intermediate DNS lookup before going to the search engine. So I'm not sure if there would be a conflict - if I was first to register "callmevlad" to point to some IP that I control, typing that in always goes to my site.
And (currently) putting things into the Awesome Bar either a) detects a domain and goes there or b) goes to an intermediate step: the search engine. I'm pretty sure some browsers do an intermediate DNS lookup before going to the search engine. So I'm not sure if there would be a conflict - if I was first to register "callmevlad" to point to some IP that I control, typing that in always goes to my site.