According to Cnet’s Brian Tong, who claims to have a reliable Apple source, we can expect an iMac refresh in the next few weeks or early May.
While there is no firm evidence (screenshots, etc) to back up this rumor, logically it makes sense since Apple recently refreshed their Macbook Pros by adding second gen Intel chips (Sandy Bridge) and Thunderbolt connectivity. It’s likely that the new iMacs will receive both of these features, but remain cosmetically the same.
However, iMac rumors are the least of interest when it comes to Apple, as everyone wants to know more about the next iPhone, the iPhone 5, and if it will arrive this June. It’s expected that this new device will features a larger 4-inch screen, a metal back and an updated antenna scheme.