The Surface Pro 1 and 2 is one crazy engineering marvel in computers. You can check out tear down pictures of the device on the web, and you can see, that device has no free space. Not even to fit another USB port.
Definitely no wasted space in there, and what's crazy is that the device deliver some serious power, cool and quiet operation, and has a better cooling solution than most larger laptops. All possible, as Microsoft is not cheaping out on anything inside.
In the case of the Surface Pro 2, they could have put single channel RAM and call it a day. But nope: dual channel. And not only DDR3, They put instead the more expensive: LPDDR3, and not 1066MHz but rather the max speed that the CPU supports: 1600MHz, with decent timings as well, same for the SSD inside. Many of the ultrabooks, I have looked at, personally (not all of them), put an SSD inside, just to say it has an SSD, but it's really the slowest SSD ever.
As for the speakers, complain how much you want, but based on my business class laptops I had before and encounter at work, the Surface Pro 2 beats almost all of them. Basically the ones that don't beat them, as 15inch or 17inh monstrosity, where they can put a larger speaker. The iPad is mono. And yet the Surface and Pro model are both stereo sound. It's only flaw is that it doesn't point at you. But if you turn them, then the resonance chamber is smaller, or none existant making the speaker sound like crap if the volume is too high or too bassy.
This is why, in the ultra high-end market of speakers, you have large speakers with a big back, or some tunneling system in the speaker. It's not just a speaker put in a wooden or plastic box.
Example:
or for non traditionalists: