Personally, I don't care for the gridded icons at all. To get any info about the items you have to hover and that's not much better than having to click them. In some ways it's even worse, since there's a delay before the info appears. I'd much prefer a detailed list. Especially one I can reorganize according to attributes.
That's easy; tool-tip delay configurable in milliseconds. Besides, that mock-up includes, as you can see, an option to make it either a list, or as icons. That UI would be perfect, easily the best I've ever seen.