Time re-enters HTML5
It would be really cool if the virtual world of computers and the physical could truly merge together.
With HTML5, the Internet has gotten a lot of features that makes it more immersive into the physical.
  THe Geolocation API lets websites know where in the world you are,   given by longitude and latitude. There is also a standard that lets a web page inform you of  a related physical location. It is the micro format "geo" specification, and you may see an example of usage on this site about where I grew up, Våler i Solør (Coordinates on the far right).
Also, the video and audio tags allows for a wider use of content that feels more "alive", in adding several dimensions to the internet experience: Sound, pictures, and time.
But really, the content on the web is still very static. Although it has become a "nice practice" to include information about when a page was last updated, there is no agreed upon or implemented standard way of doing it.  Browsing a web page often feels like looking at something that does not change. But we all know it does, it changes all the time. Adding and using TIME information on web pages is an important step for the web going forwards, as the searchable content on the internet increases, it will be more and more important to be able to separate and analyze according to date and time.