[Galaxy Tab Pro 12.2, 10.1, 8.4 General] BarryH_GEG:
A comparison of the N10.1-14 against the new tablets using Samsung's press release as a base...

[We have it] The Samsung Galaxy NotePRO and TabPRO present the world’s first 12.2-inch (or 8.4-inch/10.1-inch) WQXGA Widescreen (16:10) display, offering crystal clear resolution (2560x1600)

[We’re getting it; at least in some form] A personalized Magazine UX, specifically optimized for a large screen, allows users to further tailor their Galaxy tablet experience for their own needs. The UX enables them to organize their favorite content in an easy-to-use dashboard with automatic feed or news updates and then quickly access the most frequently used apps for a more comfortable reading experience.

[We have it; “four windows” is probably for the 12” models only] Multi Window enables users to split the screen up into four different windows and an innovative, Virtual Keyboard provides them with enough space to type comfortably, leveraging haptic feedback to produce a more realistic typing experience.

[We have it] The Samsung S Pen included with the Galaxy NotePRO delivers a more responsive, productive and overall efficient tablet experience with access to features such as Action Memo, Scrapbook, Screen Write and S Finder. In addition, Pen Window enables users to simply draw a window of any size on the screen, and instantly access unique in-application features such as YouTube or a calculator.

[Unknown if we’ll get it] Users can easily access and control their home or office PC directly through their Galaxy NotePRO or TabPRO with Remote PC in order to seamlessly edit and save files remotely.

[Unknown if we’ll get it] The Galaxy NotePRO and TabPRO also come pre-loaded with Cisco WebEx Meetings platform, the industry’s leading web conferencing solution that provides users with an easy way to meet with anyone, anywhere. And now for the first time on Android tablets, users can share anything on their screen as well as starting a WebEx meeting from contact list. Samsung e-Meeting provides collaboration capabilities by giving users the ability to share content during a meeting without having to access a central server or network.

[We have the one’s in green; the other's are unknown] For additional value and productivity right out of the box, the Samsung Galaxy NotePRO and TabPRO (12.2) will feature up to approximately $700 worth of the premium pre-paid, long-term subscription offers from best-selling news, social media and cloud storage providers, including: Bitcasa, Bloomberg Businessweek＋, Blurb, Cisco WebEx Meetings, Dropbox, Easilydo Pro for Tablet, Evernote, Hancom Office for Android, LinkedIn, LIVESPORT.TV, NY Times, Oxford Advanced Learner’s A-Z, and Sketchbook Pro (content packages may vary by region).

[The accessories that aren't size dependent should be compatible, the LAN adapter is unknown. The 12” tablets have an additional port on their right side] Designed to extend productivity even further, the following optional accessories are also available for purchase with the Galaxy NotePRO and TabPRO: Various Book Covers, USB LAN HUB, Universal BT Keyboard and S Action Mouse (accessories may vary by product model).

[We don’t have MIMO but the new 8.4” and 10.1” tablets don’t either] Wi-Fi 802.11 a/b/g/n/ac MIMO (2.4 & 5 GHz), Wi-Fi Direct, AllShareCast, BT4.0.

And I know, the devs (all two of them ;) ) might be able to port some of the features and functionality we aren't getting over. But some of us can't root because of KNOX so consider the above list for those for whatever reason are stuck with what Samsung provides.