The longer Apple keeps the cMBP, the iPhone 4S, the iPad 2 and the iPod Classic on the books, they more risk starting to head down the route that got the company into such a jam in the mid-90s: a plethora of models that make it difficult for punters to work out what's what.
I can only hope the powers that be start to kill off these outdated outliers and get Apple back to the simple model structures Steve Jobs introduced. The old tech may still sell, but it's no way to force progress. His Steveness and was far more willing to kill off old models to make way for the new (e.g. the iPod mini).
Yep. His Holiness Dear God All-Important Evangel Savior Lord Omni Powerful Ruler Leading in Tow Steve Jobs NEVER would have kept around old models. Oh, CERTAINLY not!
*cough*iPhone 3GS*cough*iPod classic*cough*
And, I hope the iPod classic NEVER dies. If you think the iPod classic should go away, YOU should go away. That clickwheel is an icon. Apple needs at least one device with it, and there's still no 128GB option for an iPod... except for the Classic.