I think many of us would like to see this capability on the Note 2.
I don't know if it would work but I am particularly hoping that I can have an unrooted "work" ROM as the "secondary" so I can use my enterprise Good email client. I am hoping it will be somewhat like dual-booting my kindle-fire where the "secondary" has to be packaged for "alternate" partitions and then have the other ROM be what I can flash various ROMs that come out. Even if the dual-boot does not work like that initially, I would want it regardless and I am guessing other DEVs could help expand on it.
For sure you can run two stock roms or two aosp roms.
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