With the removal of Rosetta in Lion and the requirement for Lion in order to use iCloud Macs are no longer an option for poeple that need to be able to run older applications.
Many places bought Macs because they could run just about anything, Windows, Linux, PPC software, even Classic applications via Sheepshaver.
The big issue is the loss of being able to run PPC applications. Freehand, Pagemaker, Framemaker, Quicken to name just a few applications that will never be ported. People and businesses have huge amounts of documents in these formats. It's not stuff that is used regularly but it is files that need to be accessed and sometimes modified.
All these applications can run on a modern Windows machine as can iCloud but not on a Mac running Lion.
While I'm complaining... I setup a bunch of Macs, iOS devices and some PCs all on iCloud today. The loss of email account syncing meant I had to spend hours setting up email on each machine ( each device had just under a dozen accounts on it) instead of just one machine and having it propagate to all the other devices. Going to be real fun trying to keep email rules in sync on all the Macs.