Oblivion was a big game but was to much, now I hear that that in every corner of skyrim there something to do, Pete and Todd stated thAt skyrim is the craziest game they ever made and is the biggest in terms of denseity, Pete said it's something like x5 the amount of fallout 3 side quests Add that there are random generated quest system (for example a npc got lost in the woods and ask you to escort him)
There is some underwater stuff. Like caves. Unknown number of towns forts camps
I didn't even mention the mainstory quests.
How can we have the time to do all that?!