The serving size is based on a more accurate assessment of what a typical person would consume. The calories are displayed in a larger font making them easier to read. The biggest change is that there are now separate lines for naturally occurring sugars and added sugars. Hopefully change this will propel food manufacturers to use less sugar in manufactured products.
For more information on serving size click here.
For more information on understanding dietary guidelines click here.
For more on sweeteners click here.