My game's had the interesting trend of becoming less combat-focused as the PCs gain levels. My Epic game just started its first genuine combat in four weeks or so (real time), at the end of last session; we play weekly so you can do the math on session time. Most sessions recently have been about exploring new information about cosmic events and beings; the players jokingly referred to one extended series of Gates as "god-hopping" because they were literally visiting one god after another in their home planes by divine invitation.
Most of the combat lately has been in my second session, which has seen several sessions filled with "dungeon" exploration and massive fights involving PCs pitted against hundreds of undead and other nasties (the area-effect casters had a field day). But that game, too, has been less and less about fighting the enemy and more and more about information gathering and preparation for later activities as the PCs gained levels. Honestly, I think this may just be the nature of a story-intensive high-level game.
Most of the combat lately has been in my second session, which has seen several sessions filled with "dungeon" exploration and massive fights involving PCs pitted against hundreds of undead and other nasties (the area-effect casters had a field day). But that game, too, has been less and less about fighting the enemy and more and more about information gathering and preparation for later activities as the PCs gained levels. Honestly, I think this may just be the nature of a story-intensive high-level game.