If you take a look at Google's official documentation for Android, you may have spotted something interesting: an as yet unreleased Google Now widget. The widget, according to the documentation, "displays a summary of your current Google Now cards, either on a Home screen or on the lock screen," and will look like the image below.
The widget is in keeping with Android's new design philosophy, as it features a nice clean design without any fuss. Interacting with the widget brings up the familiar Google Now interface and will, presumably, present the card relevant to the section you touched (e.g. If you touched the stock icon in the widget, the stock information will be displayed).
It is surprising that Google has not included a home screen widget with Android 4.2 Jelly Bean already, especially as widgets are one of Android's main selling points and a feature that Apple's iOS does not yet have.
Google has pulled the documentation that showed off the above widget which gives this more evidence that the widget is inbound.
Source: Android Central