I have a confession to make: I'm a system stat whore. Not just on my PCs, either - I want to know what's up on all my devices, all the time. I've been using OS Monitor on my tablets for quite a while now, and while the information it provides is useful, it doesn't encompass all of the info that I wanted to see at a glance. Furthermore, it doesn't offer support for quad-core devices like the Transformer Prime.
Enter Tablet CPU Usage Monitor, which recently received an update that brings multi-core support (including support for quad-core processors). After spending a few minutes with this app, I can say that it's exactly what I've wanted for many months.