In a review of Command & Conquer 4: Tiberian Twilight, Eurogamer highlighted some of the game's issues -- most of which should sound familiar if you read anything about the Ubisoft debacle. The site says that C&C4 is constantly monitor and uploading your experience-point count, and thus the game is always online. If your connection drops for any reason, you will be kicked from the game -- even in single player -- and the game won't attempt to reconnect, so your session is totally lost.
It's also noted that C&C4 plays well on a mid-range laptop, which would make it a great title to pick up while traveling, but without a strong Wi-Fi signal that isn't currently possible. It's unclear whether EA will incorporate these limitations into other titles, and let us pray that other companies won't resort to always-on schemes.