(It would be cool if dormant tabs can just hold the URL, and kill all memory requirements when dormant after N period of time..) The problem with this is that

(It would be cool if dormant tabs can just hold the URL, and kill all memory requirements when dormant after N period of time..) The problem with this is that a lot of web pages don't handle this gracefully. You don't end up back where you left off! It would be nice if all the details of the inactive web page were saved to storage, and then retrieved from storage when the tab is reactivated, without having to make any network calls at all.