No need to refresh Twitter page anymore to see new tweets.
Twitter is following the Facebook style of indicating you of new tweets. What that means is that you don’t have to refresh the page to see new tweets.
It also indicates the number of available new tweets on the title bar (tab bar). I’m not sure if how many of you still get to the Twitter home page to tweet but if you do then you’ll soon realize that this minor change would be a welcome change.