Final Cut Studio and Logic Pro are a couple of the prime examples of software best still delivered via Disk. Not only is the software mammoth, it takes over 3 hours to install directly from the disks. And as fast it is to transfer data via disk compared to over the net, you bet that this would be a huge problem for 2 reasons. One, it would take forever to install. Two, a lot of folks have monthly limits on data, so you'll be hitting walls a lot quicker, that way.