Personally, I think the design is fantastic.
Once you're free of the SuperDrive and large HDDs, I suppose you really can come up with a creative solution for cooling the CPU and GPU.... which is what they've done.
Just because computers have always been a large cuboid with fans here, there and everywhere doesn't mean that's the best solution. A single unified heatsink inside of a cooling tower seems like a damn good idea, and it must work pretty well if Apple are this confident in the design to show it off. A 12 core CPU and two beasty GPUs are going to create a lot of heat, I think everyone will be amazed how something of this size is able to cope with that... whilst toasting marshmallows over the top. Now that's multitasking.....

Once you're free of the SuperDrive and large HDDs, I suppose you really can come up with a creative solution for cooling the CPU and GPU.... which is what they've done.
Just because computers have always been a large cuboid with fans here, there and everywhere doesn't mean that's the best solution. A single unified heatsink inside of a cooling tower seems like a damn good idea, and it must work pretty well if Apple are this confident in the design to show it off. A 12 core CPU and two beasty GPUs are going to create a lot of heat, I think everyone will be amazed how something of this size is able to cope with that... whilst toasting marshmallows over the top. Now that's multitasking.....
