Screen double the size of this one! Hard drive six times the size of this one! Processor um, much faster? 2GHz G5 as opposed to 800MHz G4? Shiny new OS! Shiny new keyboard! Shabby old mouse because Apple Still Don't Make a Decent Mouse. Another set of Creature speakers because I've heard the sound from the inbuilt speakers and it's absolutely rubbish. Free shipping in a few days. And just about £400 cheaper, with a better spec, than the one I costed a few days ago. Hey, it's almost like saving money. Though what will I do if I can't make a cup of tea while applying a filter to a Plokta cover?
The only downside, if there is one, is losing the anglepoise screen; a feature I still use every single day and will miss hugely. This was one of the first anglepoise iMacs, and they said the screen support would stay stable over time. I could sell this computer on eBay and defray a substantial portion of the cost of the new one -- probably a third. But in fact I'm giving it to my kids, who will no longer get to complain that they're never allowed on the iMac.