The widgets on the System Page are displayed on every other page.
That’s perfect for e.g. status widgets, that show the status of a global task.
You only need to add one widget to the System Page and after that, you are able to manipulate it from every page.
Unfortunately, the ProntoScript tag of the System Activity and the System Page is not shown in PEP2. So, there is no obvious way to access widgets on that System Page via ProntoScript.If you like my work, buy me a beer. (Suggested: 3€ for a beer, or more for more beer ;-) )