Regarding the case: What I would like to see (with the 1.2 th/s rig) is a shell that encases the system for shipping, but that can be easily removed when the unit is placed in a safe place for operating. Once removed the chips are open to the air and a fan can be used to evacuate the warm air from around the rig. This makes for a happy operating rig. Forget the fancy shell, as long as it hashes, that's all that matters.
You need a case with well designed flow, intake and exhausting, if its done right with cold feed and hot exhausting, appropriate ducting and dumping outside the case, it can work just fine, but most home's aren't designed for hosting. But if your hosting elsewhere the case can help contain and direct the air volume and flow, but the inside does need a clean design with air cooling in mind if that's whats implemented, there's talk of oil cooling on Bitmine this will very likely require a case to hold it all together. Also its very likely be a lot more expensive of an enclosure and cooling solution.
What? More expensive enclosure and cooling solution? You are aware that oil-cooled builds existed back in the PC days (as if they're over...), and just involve submerging everything in oil, right? Often, a small glass fish tank was used. It isn't expensive at all.