According to Intel, Merom and Conroe are ahead of schedule. These are the next-generation chips redesigned with ideas from the Pentium-M/Core Duo line and will run on even less power than the Core Duo. They'll also have a 4MB cache. But the big thing for me is that they will have 64-bit capability. I ordered the new iMac last night and then read that Conroe is ahead of schedule, and now I'm wondering if I should wait the six months until July when the chip is now due to be released. Normally, Apple's secrecy doesn't bother me, but this is one of the cases I really wish they'd open up about their future plans. Are today's Core Duo Macs just a 32-bit stopgap? Will they be obsoleted in two years as everything goes 64-bit (for better or worse)? I need a new Mac this year, and I'm seriously considering canceling my order and waiting a few months to see what starts rumbling from the rumor mills. You always go obsolete when you buy a computer, but I'd rather have a Conroe-based iMac and not worry about begging for 32-bit binary compatibility in apps in the future, especially if OS X Leopard has a fully 64-bit version. If developers supported 32-bit at least another two years, I'd be satisfied that I could upgrade then when 64-bit became necessary, but unfortunately there's no way of knowing how much 64-bit will take over in the next 12 months. Anyone else's thoughts?