At a special event in New York on Wednesday, Apple introduced updated PowerBook G4 15 and 17-inch models with new, higher-resolution displays and up to one hour of additional battery life.

What's more, all new PowerBooks include a DVD-burning "SuperDrive," with prices unchanged from before – systems start at £1,099.

The 15-inch PowerBook features 1440 x 960 pixel resolution – similar to the resolution of previous generation 17-inch models, 26 per cent more than previous 15-inch systems. The 17-inch PowerBook now features 1680 x 1050 pixel resolution – 36 per cent more than before, the same resolution as Apple's 20-inch Cinema Display.

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All PowerBooks include built-in Bluetooth 2.0+EDR (Enhanced Data Rate), integrated AirPort Extreme (802.11g-based wireless networking), a scrolling TrackPad and Apple

The £1,099 12-inch model is clocked at 1.5GHz and includes 512MB of PC2700 33MHz DDR SDRAM, an 8x SuperDrive, 80GB hard disk drive, DVI, VGA, S-video and composite video support, two USB 2.0 ports and FireWire 400.

The £1,399 15-inch PowerBook features a processor clocked at 1.67GHz, an 8x SuperDrive with double-layer support, 512MB of PC2-4200 DDR2 SDRAM running at 333MHz, expandable to 2GB, 80GB hard drive, analogue and optical digital audio input and output, Gigabit Ethernet, illuminated keyboard and ATI Radeon Mobility 9700 graphics with 128MB DDR video memory and Dual-Link DVI support, to support Apple's 30-inch Cinema HD Display.

The £1,749 17-inch PowerBook features a double-layer 8x SuperDrive, 1.67GHz processor, 512MB RAM, 120GB hard drive and the other features found on the 15-inch model.

Apple offers additional build-to-order options for various models including expanded hard drive, different slot-loading optical drive and more.