"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
More Quad-Core iMac Benchmarks Show Substantial Performance Gains
Speedmark is Macworld Lab's standard test tool for benchmarking new and upgraded systems running Mac OS X. It uses real-world applications and everyday tasks. It is a general-purpose suite that includes tasks everyone from a high-end user to a new user performs every day.
Macworld Lab follows a detailed script to perform the 17 tasks. Each task is performed three times. We compare the results to a 2.13GHz MacBook with 2GB RAM (Mid 2009), which is assigned a score of 100. We then take the geometric mean of the normalized scores.
Speedmark 6 Composite Scores
Detailed scores for individual tasks available in article
As Macworld notes, the new iMac is an attractive option for even professional users, comparing extremely favorably with the company's latest Mac Pro models.
With the new 2.66GHz Core i5 iMac and the 2.8GHz Core i7 iMac, Apple has not only blurred the line between consumer and professional systems, it's darn near erased it. The 2.66GHz Core i5 iMac offers faster performance at most tasks than the 2.66GHz Quad-Core Mac Pro. The Core i5 iMac also has more memory and more storage space than the 2.66GHz Quad-Core Mac Pro, while being $500 less (plus you get a 27-inch screen with the iMac). Unless you absolutely require additional PCI cards, multiple internal hard drives, or a lot of RAM, the Core i5 iMac makes a strong case for the being the go-to system for most Mac professionals.