Not only because of this big margin win, but definitely this season's Barca is most probably one of the best Barca's in the 21st century.
The 2008-09 season could very well be repeated if Barca keeps it up like this.
A striker/forward like Luis Suarez was the missing piece in Barca's attacking part, and since the mistake with selling Eto'o and buying Ibra, Barca failed to create a proper attacking trio, with Messi ending up the most pressurized in the team.
It would be silly to say that Barca misses some piece in their puzzle (regarding players), because if they manage to win La Liga and CL this season, then what more could you ask from a team at this level? They would need some replacements (Xavi, Alves) if they leave, but I doubt Barca will have any trouble doing that.
Simply, one of the greatest football teams to be evoked. I can feel the vibe of the historical 2008-09!