I can't imagine that very many of you are that hardware-needy in terms of what you're using the machine for - are you?
For some there might be a little ego involved, for others, it really is a necessity. The reality is that the iMacs are now contending with MacPro Towers, which professionals have relied upon for years. Both of my g5's died (remember those). Technology has brought the Prosumer offerings into the realm of satisfying quite a few Professionals. I'm a full time photographer making 6 figures. Time is money. This machine will pay for itself in a month in productivity, happy clients, billings, referrals, and a happier me. And when you are really pushing the data through a machine, the hyper threading does matter, i7 will save me a few hours a week, or several hundred dollars. Its all relative...