I'll bring this up again since it hasn't really been answered and I want to know
What exactly are these different purposes? A PC can do anything you want and need. What does the Mac offer that a PC doesn't? What does it do better? There has to be something to justify that price tag?
Well it has, many times and ignored. Design, build quality and form factor are all contributing factors. As is OSx itself and many Mac only bits of software.
And, yet again; what price tag? Comparing like for like they're priced pretty similarly.
For example, a high end 13" laptop such as the Thinkpad x1:
Intel Core i5-2520M Processor (2.5GHz, 3MB L3, 1333MHz FSB)
Genuine Windows 7 Professional 64
13.3" Premium HD (1366x768) LED Backlit Display
Intel® HD Graphics 3000
4 GB DDR3 - 1333MHz (1 DIMM)
TrackPoint with Fingerprint Reader and Clickpad
320 GB Hard Disk Drive, 7200rpm
£1053
MBP 13"
Intel Core i5 2.3Ghz
OSx Lion
13.3" 1366x768 LED backlit display
Intel® HD Graphics 3000
4 GB DDR3 - 1333MHz (2x2gb DIMM)
320 GB Hard Disk Drive, 7200rpm
£999