Item 10 and then some
I have to second item 10, multiple windows. Along with that should be process control, not only being able to kill a process but also to put a process/app in hibernation. Even better, add a sandbox mode where a process can think it has complete access but actually is running on a virtual machine. Finally, why not have a snoop mode for all data being sent, with a log identifying when and what process/process-tree is sending. Ideally, the log/data could be sent to cloud storage where it would not eat space and could be analyzed, if desired, by more powerful hardware and software.