The laptop landscape is dominated by sleek Ultrabooks, but we're pleased to see machines such as the Toshiba Satellite P70-A-109 emerge - it's a larger laptop that has more versatility and power than any ultraportable notebook can hope to match.It's built around a high-end Haswell processor, and the rest of the specification is suitably impressive: a discrete Nvidia graphics core, two hard disks, 16GB of RAM and a Blu-ray writer. The 17-inch screen has a Full HD resolution, too.The £1,199 Toshiba Satellite P70 needs to impress, though, because it's up against some heavyweight competition. The Samsung Series 7 Chronos - now known in some circles as the Ativ Book 8 - includes a powerful processor and a superb 15.6-inch screen in a sleek chassis, and the HP Spectre XT TouchSmart arrives with a swish all-aluminium build.