The new UI is streamlined, minimalistic, and functional. While every option isn't presented by default, all of the options are a click-away. Fans worried about a simplification based on Civilization Revolution should not fear. Notifications are also handled by an icon system. You won't have to follow laggy, scrolling text only to miss the blurb about your scout being killed by barbarians. Mouseover the icon for a quick overview of the event; click it to jump right to the point of interest.
In an effort to avoid the "stacks of doom" from previous titles, units will no longer be able to share tiles. The developers at Firaxis want the player to have smaller armies that cost more to maintain instead victory going to the player that bankrupts themselves by cranking out units. To this end, resources will play a major role in Civilization V.
