Automatically load new tweets when you're at the top of your feed option.
Users who look at Twitter while they work or play games would benefit from a Twitter feed that loads new tweets in real-time without the need for manual interaction. When at the top of your feed, instead of reading "▲ 5 TWEETS" the feed will simply jump to the newest tweet on refresh. This feature would be entirely optional.
The Chrome extension "Auto Refresh For Twitter™" does this perfectly.