2006* 2004, Apple released the iMac G5. Its cutting edge, all-in-one design instantly resonated with users looking for a desktop that delivered equal parts power and space saving design. As the years have passed the iMac has continued to improve, becoming more powerful while slimming down even more from its impressive original space saving design.
Good job, HP. Imitation is the sincerest form of flattery.
*Correction: The iMac G5 was released in 2004. HP has actually been catching up for 10 years.