At the beginning of the year Hewlett-Packard (HP) launched a range of PCs with touch-sensitive screens.

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With USB source selected, DJs can browse music and load tracks on the XDJ-AERO using the devices' bigger, touch-sensitive screens.

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Windows 8 is designed to work well with touch-sensitive screens, but the displays add to the cost of a PC.

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Which brings me around again to the Lexus system, which just four years ago seemed quite clever and now seems clumsy and naive, compared with the recent crop of systems with capacitive (touch-sensitive, iPhone-style) touch screens.

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