I just noticed in the buyer's guide that the Mac Mini, iMac, MacPro and cinema displays are all coming to the end of their respective refresh cycles. OK, so that makes it a bad time to buy any of them (unless you really need them), but what a coincidence... new OS just around the corner too.... I'm betting that the 'secret features' in 10.5 tie-in with a whole new hardware concept. The form factors may stay the same, but with an integrated "new technology".
Or not
Or not