You are absolutely correct, and my rant is not about if apple can do anything, because frankly its the same technology they all use, its the same on all laptops.
The "problem" is that the majority of people with any knowledge of what they are paying $3000 for, will know that most of the time the native resolution of the retina display will not be used, because its either waaaaayy too small to the "small" 15" compared to resolution or... what ever they are doing is not supporting the massive resolution fully. This means most people I bet will leave it at the default setting of 1920x1080 or even 1680x1050, which means the retina display becomes totally pointless, and will look worse because of scaling.
It's just scary to see how many people rave about this amazing "new" apple technology, that has NO idea how this will impact their use of an already expensive laptop, and why this "new" technology is not used on other laptops (yet). There is a reason for that...