I've been wanting to jump into the Mac scene for awhile now, and these new iMacs are exactly the excuse I've been needing to force myself to do it. An iMac with a dual-core Intel chip? Man, two years ago that would have been unthinkable.
I occasionally have ideas and time to work on ideas, but often not both at the same time, and not the organization to keep track of these ideas. This mostly results in many text files of notes that I quickly lose track of.