A ton of information
Notes have been redesigned to fit in consistently with Windows 8, each note can be separately customized, for example, each note can have a reminder set to it, a custom colour and also tags. Tags (in the future) will allow you to manage your notes easier by allowing you to search for them.
Notes can now also have images and custom text pasted into it, StickyNotes will also allow you to customize your note with custom colours, fonts and font sizes, just by selecting the text and clicking the appropriate option.
You can also search the web by selecting text (similar to IE's accelerators) and clicking the search icon. You can have unlimited search providers and they can be fully customized.
You can also set notes to Autosave, which will intelligently save them every 10 seconds to insure that you never lose any data.
Notes will remember their location and size when you close them, so once they are reopened, they'll spring right back into place.
Managing Notes is also easier, due to an increased amount of keyboard shortcuts, which will decrease the amount of time wasted searching for delete buttons, or open buttons. Clicking a tag will search Wikipedia, allowing you to get a quick definition if necessary.
Preferences has been redesigned, featuring a clean, simplistic interface which makes it easy to change settings, such as default colour, storage location and background colour (it is currently set to Dark).