Its claimed to be the most advance processor. Those cleansweep etc, you can use it with your stock HU to improve the signal and have some processing power. Now with the MS8 or PXA650, the even more powerful processor will tune for you. The JBL engineers say that it is not like those old built in tuner like in old alpine and pioneer HU. It is instead equipped with tools like 512 band EQ etc.
Sounds like marketing talk ? But Gary Biggs wins the world champion with the MS8 in the JBL team car, using the new BMW 3 series stock HU.
Rumoured to be retailed for US$800 for the MS8 and $300-400 for the PXA650 IIRC. The 9887 also has the same feature with PXA650, but you need to buy the tuning kid.
For more info, you can go to carsound.com and search for MS8. The marketing manager started a thread there with very detailed info.