Apple launches Mac App Store today — from Apple.com; also see this article at FastCompany.com
Excerpt from the FastCompany.com article:
The arrival of the App Store is causing much debate online about the changing nature of PC software. Much as the iOS App Store is the key to the iPhone and iPad’s success, and beats its competitors app store efforts, the Mac App Store has massive potential to upend the PC software vending market. Early indications suggest Mac Apps will sell for less than the traditional price brackets Mac software’s been sold at for decades. This could revolutionize the Mac market, turning it into something that could really allow Macs to challenge the traditional Windows market dominance in enterprise or at home–particularly as it’s a one-stop-shop for games, utilities and so on, and even handles updates in a way Windows can’t challenge.
Also see:
How the Mac App Store Changes Everything — from Mashable.com