In my opinion, nowadays, a regular home internet connection is perfectly sufficient for holding tournaments that span over time. Back then, people would compete within their local groups at home in HotS or at university/home/club LAN parties, and then gather in clubs to see whose "sandbox" was better.
The current series of tournaments, again in my opinion, pursues not only the stated goals but also unstated ones: uniting communities, allowing players to get to know each other personally (which in most cases leads to resolving conflicts on forums), and so on. Therefore, the participation of players from other cities in the Moscow tournament is only welcome.
Moreover, the Moscow tournament has a specific task: many are looking forward to it to finally clarify the situation regarding Vitalik. I remember many suggesting that he participate in a club tournament and demonstrate the same results as in online tournaments; many (including me) simply wanted to see his playing style – again, the proposed tournament format makes the second point practically impossible.
I will try to participate in the tournament regardless of the format or rules. But at this historical stage (:p), I believe that a club tournament should adhere to the principles of classical drama: unity of time, place, and action.