The difference between games that has had WASD movement before is the fact that movement is not the most essential thing of Incarna.
You won't be exploring the fields for some quest items.
You will be in a location A, have your social interaction there, then go to B and have a social interaction there.
If something interesting happens while going from A to B.
You will stop and interact, not run around the interesting event while trying to have a conversation.
The pace of Incarna will be something completely different than any other MMO, especially if you can't even run, or jump.
If we would have the ability to chat efficiently while moving (which we will if you can do your interactions through voice) and the regular movement options, then the capsuleers will be running around jumping going 'LOLOLOLOLOLOLOLOLOL!!!'
Besides if we are going for immersion here, then usually you only talk with people you are actually going from A to B with. You won't be doing channel RP while going to a bar to have similar interactions with.
You won't be playing EVE, while in Incarna, you will be playing Incarna.
Yes, there will be communication between those two games, you will probably gain information about what is going on in EVE through channels, but your primary interactions will not be there, because you will be in Incarna.