HTML 5 has a lot of new features. Most of them are really cool and can be used really creatively. I think HTML 5 is going to allow more graphic designers and web designers to be able to create well design and interactive websites without much help from programmers. It seems like most of the code is kind of straight forward. One of the new features is called geolocation. This allows the user to allow or deny sharing their location with the website. Sharing the location can give you a GPS map of your location, like Google Maps does. The only thing I wonder is if people could get past the security feature of having the user actually allow the use of geolocation and be able to find your location.
I found this website that uses the HTML 5's geolocation to find your current location and finds the current star patterns that can be seen from your location. http://www.nakshart.com/ I have tried the website with Safari but it didn't seem to work. If you try it with Firefox it works well.