You might want to check out this new and quite unique camera comparison site: Digital Camera Database. It allows you to visually compare detailed sensor info (sensor surface area, pixel pitch, pixel density, etc.) for more than 3,200 digital cameras.
Probably something that’s quite handy for not only pixel peepers and might even tip the scales when deciding for or against a planned gear purchase.
Here’s a screenshot from the Fujifilm X-E1 vs. Sony RX1 comparison: