Some popular technology sites started the rumor, that the new version of Android will require dual-core processsor, as well as 1280x720 resolution diplay.
Personally I don't belive it's true, we all know, that Gingerbread was also told to have some minimal requirements, but few days after the rumor was dispelled by Google.
Really, if they want to unify anything in Google Android devices, they should start from the buttons order :)
Other rumor said, that there will be 2 versions of Honeycomb - one for high-end tablets, and the other for the old ones, with single core, like Galaxy Tab. This is also fake for me, I don't believe Google would want to fragmentate Android OS.
Hope we will hear answers for these questions soon.