Technically speaking EOAs are no longer needed with AA, since the one sending the transaction doesn't need to be an account anymore. It can be one of many different things - typically just a keypair.
Most likely EOA as a concept will not be used with AA, unless the transaction sender, for some reason, is also an account. Of course we'll have EOAs for a long while alongside AA stuff, or maybe always.
I'm not exactly sure of what kind of AA wallet implementations exist currently in Ethereum, but I would imagine the first ones are just utilizing existing wallet software. Therefore it's easiest to just use the keypair from an account. I don't know if there exist wallets for purely AA connections yet - but at some point most likely will.