7-, 8- and 10.1-inch unannounced tablets mentioned on Gear Fit site
It's a safe bet that we'll be seeing more Galaxy Tab devices from Samsung at some point, but if the small print on one of its own websites is to be believed then we might be seeing them sooner rather than later. On the official Gear Fit features page, the some 20 compatible devices are listed which includes the as yet unannounced Galaxy Tab 4.
Following the Galaxy Tab 3, there looks to be three size options again, a 7-, 8- and a 10.1-inch version. We know that the Gear Fit will be compatible with all three, but after that, nothing.