Panda introduces cloud-based free antivirus

Panda introduces cloud-based free antivirus and although it's beta right now, it's going to stay free once RTM version releases.

http://lifehacker.com/5234347/panda-cloud-antivirus-is-a-lightweight-always+updated-virus-killer - On-the-fly realtime antivirus for FREE... but is it better or going to be better than AVIRA or AVAST? After all, panda is a well known antivirus company and panda software seems to do well, but ....

Now let me get this.
If I have a cloud computer;
1. I do not need applications, thee are in the cloud.
2. I do not store date on my local machine, it is in the cloud.
3. My OS could be just embedded XP.
4. There is no place on my PC where a virus could live.
5. So they will not charge me anything...
         for scanning a machine  ...
            that could not have anything!