For me, I too have been hearing the rumors about round bases in fantasy. Even to the point of having the War of the Rings movement trays (made to put rounds bases to line up in a square formation). And for me, if the round base became optional, then that's fine. But making it as a part of the rule where you must have round bases wouldn't make sense to me. Where as the new movement trays for the rounds bases lines up the models for a square block. But my square base models on the old movement tray does that too. And I find that having either a square base or round base for skimrish type of games don't make that much of a difference since I have played both necomunda and mordheim. The movement in and around terrain and base to base contact with models hasn't really changed much based on the type of base.
And I still believe that GW moving along the fluff, killing characters and such was pretty cool and needed until they destroyed the whole world.
With the whole bubblehammer rumor happening, if it ends up being chunks of the old world floating around in the Choas warp, then that would be ok because it's still parts of the warhammer world. So you could still have your old battle grounds and old cities like before. The only different is mainly the sky isn't blue anymore, with float chunks of land in the distant sky. It could work.
But I still perfer they didn't destory the warhammer world though.