The Corsair 7000D Airflow caps off the new "thousand D" line-up of cases quite nicely. While it is not massively bigger than the 5000D and easily dwarfed by the Obsidian 1000D, the 7000D does have a few solid reasons for existing. However, starting with the design, it looks exactly as we would expect. Corsair has done a great job translating the design from the 4000D and 5000D and stretching it out to the 7000D. That said, the looks being clean, straight and flat, enlarging it to fit should not be considered rocket science, so to speak.
In terms of the frame, the 7000D nicely builds on the 5000D, with many similarities, from the cable trenches to the fan controller and similarly designed two-part shroud or liquid-cooling layout. At this point, some may think there isn't too much to drive someone to go for the 7000D at a noticeable $100 premium over the 5000D as both are considered full-tower enclosures.
That holds true for those who don't need to push the envelope on liquid cooling, GPU setup, or storage. Those are the three areas the 7000D manages to differentiate itself. Starting with four USB 3.0 ports instead of the two on the 5000D series and a wider body with better vertical GPU compatibility along the ability to hold bigger radiators all around, the 7000D makes good use of the space for those scenarios. The most functional benefit, however, is the ability for plenty of storage. Corsair has upped the 3.5" storage capability to six, and adding the four 2.5" placements makes for up to ten installed drives within the 7000D Airflow—this could be the biggest selling point over the 5000D for those who require a ton of storage.
But I would have loved to see a bit more in a few areas, including a third fan in the front, more 2.5" screws, and a few minor tooling tweaks. That having been said, the Corsair 7000D is just as nicely engineered overall, offering a few good updates that make sense for its size. In the end, the Corsair 7000D Airflow still comes at a slight price premium over other feature-rich cases, so things may not be so clear to those for whom cost is a driver on top of engineering, material mix, and looks.