I don't care, as long as it's tons of fun, and as long as bethesda releases a steady series of very good DLC's/expansions while working on whatever TES 6 is going to be.
Going to another continent is great, but not necessary. As best as I can tell, the current continent has not been completely 'explored' in the 5 games. Also, it's undergone changes - Morrowind was sorta destroyed/paved over by a big volcano, and Cyrodiil got invaded and sacked by thalmor fascists who destroyed lotsa stuff along the way - including the imperial city and the dark brohood HQ.
Consider also that Bethesda really opened things up beautifully by creating black reach. What this means is that provinces can be 'stacked.' Damn smart of them.