I am not arguing. I am saying that you are wrong. We already know that the lines are staying the same. There might be a new entry to the line but the MBP, MB, and MBA are not merging.
Also as I have been trying to point out to you, it is not the name that is important but the specs and the market that is being targeted that distinguish the lines.
The MB is for general consumers. You can call it a pro if you want but it would be pointless.
The MBP is targeted for professionals.
The MBA is targeted toward the active traveler or someone in need of ultralight computing.
I guarantee you that the MB will have integrated graphics. If you need or want more then you need to step up to the pro.
Personally I think the $899 MB maybe the equivalent of a fancy netbook and kindle reader.