To be fair, outside of the engine upgrade, Battlefield 3 wasn't exactly the world's most revolutionary Battlefield sequel.
it was different enough, even when it was a bit of a step backwards in some aspects and more streamlined than 2. But yeah no Battlefield sequel was exactly revolutionary
This so far pretty much sounds like what BF3 should have been (except for more close quarter maps) with the Commander feature and all..
also if the "it's more of an evolution" rumor is actually something said by EA/Dice then at least they're being somewhat frank about it.
It's probably gonna be a more worthwile experience for console owners when compared to BF3 than to PC players
graphics-wise im honestly expecting it to look the exact same than BF3. Maybe with some added flair like dynamic weather