As the U3 devices are still not available for purchase.
Sure? There are tons of offers in the official website... Are all of them promissing what they can't deliver?

The official website also
says: "U3 smart drives will begin shipping on Oct. 15 from global brands: ..."
I believe the launch was even postponed a little, but I might be wrong.
What we need for a major version jump?
New functionality, for example?

Well, I'm not the one to decide about the version numbers, I just think that a new driver, that would provide the same functionality (as it was on the older platforms) for a new OS, is not really a new stuff. Anyway, I think it's not important what the version is labeled - but rather what it can do
