I get the impression it's more that they want exclusivity over the name, everywhere. Even if they contract Samson to start producing American-style Budweiser in the Czech Republic, wherever they sell it Budvar will already be there, and won't go away.
Purchasing the Budějovický Měšťanský name seems like the kind of thing you'd do as a mop-up operation after closing down Budvar in order to ensure absolute exclusivity. I don't see how it changes much at this point.