At European shows like IFA and Mobile World Congress, you get product announcements from the likes of Samsung, Sony Ericsson, Acer, ASUS, etc. You get some hands-on time, then we return to the U.S. and hope that one day you'll see the devices here. When the original Galaxy Tab 7 was announced at IFA in August 2010, it was done so without any specific U.S. availability (just "in coming months." Same goes for the Galaxy S II and original Galaxy Tab 10.1 at MWC 2011.
That's par for the course for these European events. Products are announced. Any U.S. availability announcements generally come later, more often than not from the U.S. carriers, which will actually sell the devices. (In the case of the original 7-inch Galaxy Tab, word came just a couple weeks later, but don't use that as a benchmark.) The U.S.-based shows are usually a little different -- you'll generally get vague timetables for American release, which are very much subject to change. (Hello, Droid Bionic.)
This is PR 101. It ain't official until it's official. So when Samsung says it has "no plans" for these latest releases, it doesn't mean you'll never see the Galaxy Note or Galaxy Tab 7.7 here in the states. It just means it currently has no plans. Or, more accurately, it hasn't announced any plans. That's all.