an overwhelming majority of objects in the physical universe can be extended with metadata, whether it be a:

• Person
• Car
• Relationship
• Job
• Recipe
• Philosophy

Ultimately, it seems like the metaphor for a universal "Data Object" in the most natural user interface will emerge.

For example, looking at a tree, I should be able to access its metadata in several ways:

• on the web
• in real time through my smartphone
• through Google Glasses