The iMac is shipping this week, many are already in transit to Apple retail stores.
The MacBookPro will ship in "February", which is exactly what Gateway is saying about their Intel Core Duo powered notebooks.
Both the iMac and the MacBookPro use an Intel chipset and Apple has stated that they're not going to stop users from using Windows. *However* it is not possible to boot an unmodified copy of Windows at this time. This is because the new Intel powered Macs don't use a traditional BIOS, they use Intel's much newer EFI (extensible firmware interface), the BIOS replacement that Intel has been hyping since about 1998. Windows XP doesn't support EFI at this time. I have personally seen EFI in use on Itanium/Itanium2 powered workstations, it's much more powerful than a BIOS as it has a scripting language, command-line interface, and even some basic GUI interfaces to common settings. EFI is much like the PROM on an SGI workstation or the OpenFirmware interface on a Sun Workstation or PowerPC Mac.
As for prices, there will always be companies selling less than Apple. And it's hard to beat Dell when you have three or four stacked coupons. But I think Apple's prices are pretty good for what's all included. Especially if you're a student. For me, $1199 buys a 17" iMac with Intel Core Duo, X1600 128MB graphics (X1600 is pretty good for a consumer machine), 8x slot load DL burner, 512 MB / 160 GB, built-in good quality webcam, a remote control, 802.11g, Bluetooth 2.0, firewire, gigE, basic keyboard, Apple's funky new mouse, and the whole iLife software suite, which keeps getting better and better. I think they also bundle Quicken 2006 and a couple games.
Or if I go with a laptop, $1799 buys me the new bright 15.4" LCD, Intel Core Duo, X1600 128 MB graphics, slot load burner, 512 MB / 80 GB, built-in good quality webcam, a remote control, 802.11g, Bluetooth 2.0, firewire, gigE, backlit keyboard, trackpad with scroll features, sudden motion sensor (to park the HD heads or to use for some crazy games), mini-optical audio out, ExpressCard/34 slot, lithium polymer battery, magneticly attached power connector (no more broken connectors when you trip over the cord), dual-link DVI (can drive Dell's new 30" LCD or Apple's 30"), supports dual monitor, not just mirrored. An IR remote control. Includes iLife 06, some games, and QuickBooks accounting software. And it's just 1" thick and skinned in aluminum.
The only thing I'm not sure about is the RAM. I don't know what Crucial charges for a stick of 667 MHz DDR2.
Yes, I'm gonna buy a MacBookPro as soon as someone creates a hack to dual boot into Windows and/or finishes the Mac port of Wine for running Windows apps inside Mac OS X.