COCOMO II models are based upon SLOC (source lines of code) estimates. You plug in a bunch of other metrics, like the language, type of application, quality of coders, calendar, etc. What you get out is a reasonable estimate, built from the analysis of 1,000's of real-world projects.
"How many lines of code?" is often easier to answer than "how long will this take?" Is SLOC accurate? No. But, it's only a small part of the process. You can always factor out waste from guys you know are gaming the system. With a decent tool, you can even plug in actuals from previous projects for fine tuning.
It's very similar to other methods, but tends to be a bit more accurate... despite asking for lines instead of hours.
That low-level access gave the Amiga several firsts:
Hardware accelerated 4-channel digital audio
4,096 colors (when the PC was limited to 16... Hercules offered hi-res monochrome)
Hollywood acceptance as an A/B video editor + SFX engine (commercials of the 1980's & Babylon 5 + others)
The exclusive screenshots to every PC title for a decade
Granted, computers have come far today. Consider their inspiration. The Amiga really did pave the way for advanced technology. It was a brief moment in PC technology that shaped the entire industry. Had Commodore had decent management, they would have ruled the world. The Amiga was at least 10 years ahead of everything that followed. Claiming superiority more than 20 years later is slightly lame. Of course we've surpassed the original hardware. You still need to acknowledge the masters of history.
"The one charm of marriage is that it makes a life of deception a neccessity." - Oscar Wilde