If you are shooting color critical work, you will be amazed at how much more accurate color is from a camera that's been profiled. I shoot a lot of fine art and am amazed at how much easier it is to match color now.
Accurate? Not unless you're referring to scene referred data. Output referred data by its very definition isn't accurate although it IS pleasing!
Accurate color is a marketing buzzword.
Even the ICC had to post a white paper to define the differences: