We've seen that today, Intel already has the performance per watt crown with the Core Duo, and they also have the power advantage, consuming a third less power than a similarly clocked G5. Yet, the first Intel based Macs are nothing more than the G5 versions with a different motherboard and cooling. You tend to not over-design your chassis when you are Apple; rather, you design them to be as sleek and as minimal as possible. With the Core Duo based iMac consistently consuming 20 - 30W less than the G5 version, you can expect that the truly exciting Intel based Macs are the ones that don't look like these. It's those that I would personally wait for.