According to their sources, the Galaxy Tab S line will consist of 2 larger tablets with 10.5" and 8.4" screens. The specs will place the Tab S closer to the premium Pro lines than the budget Galaxy Tab line.
The Galaxy Tab S will pack an 8-core Exynos 5 chip, combining four 1.9GHz cores and four 1.3GHz cores as well as a 6-core 533MHz Mali-T628 GPU. They will have 3GB RAM, an 8MP camera, and a 2.1 MP camera. In terms of connectivity, the Galaxy Tab S will offer Wifi, Bluetooth, Glonass, GPS, and an IR blaster. There will also be models with LTE, but current reports say there won't be a 3G model.
Both the 8.4" and 10.5" tablets will have a new WQXGA AMOLED display with the same resolution: 2560 x 1600. They will also have a fingerprint scanner, and like the Galaxy S5 smartphone the scanner will be built into the home button. No pictures of the Galaxy Tab S tablets have leaked yet, but the tablets are described as being similar in design to the recently announced Galaxy Tab 4, only with slimmer edges and a nicer perforated back panel.
These are a rather curious set of specs, and I have to wonder whether they are real. These tablets are largely the same as the existing Galaxy Tab Pro line, only with an extra GB of RAM and a better screen (and a better CPU for the 8.4" model).
The tablets I described above read like someone took the specs of the Galaxy Tab Pro 10.1, added another GB of RAM and a better screen, and then slapped a new name on it. With that in mind, I think we could be looking at new and smaller Galaxy Note Pro models. The only existing Galaxy Note Pro has a 12.2" screen, and Samsung might want to compliment it with smaller models.
But there is no mention of a stylus, so maybe not.