I don't understnad.
Apple clearly has a huge gap when it comes down to their product line.
As all know, Apple is growing, and if they want to go higher, they, sooner the better, have to fill this gap.
The Op definitely has a legitimate point.
I know that this is Apple forum, hence more people are trying to defend Apple, and bash those who are about to say anything offensive about Apple.
I also think that spending 1500+USD should atleast give me a certain level of hardware performance.
Since today's trend clearly lies in laptops, Apple is still doing well. Apple offers very nice laptop models. Macbook Pro is plenty competitive against other PC laptops in both speed and OS reliablity. But Apple lacks so miserably in consumer/prosumer desktop line.
If they want their market share to grow, they gotta offer those. People (albeit low in number) interested in prosumer desktop lines are those who knows more about computers in general and hence can offer a great advice to their peers about to switch to Apple.
Sooner or later, Apple has to get these group, who are not professional yet interested in computer hardwares. Their number may be smaller than general users who don't know how to backup/upgrade hardware, but they can affect many people to switch if their experience with apple hardware is possitive.
ps. sorry for grammer and spelling issues, Engllish is not my first language.