Dell has refreshed its line of tablets and notebook PCs with its new Venue brand. These include a wide variety of form factors, price points and sizes ranging from a 7-inch tablet running Google's Android OS to a powerful 15-inch Ultrabook running Microsoft's Windows 8.1. However it is bad news for Microsoft. Dell took Windows RT tablet, the XPS 10, off the market last week and has no plans to replace it.

Instead Dell showcased Windows 8.1 in its new XPS 11. This Ultrabook, which converts from a tablet to a notebook with a 360-degree rotating hinge, a backlit touch keyboard with a Quad HD (2560 x 1440) display. It starts at $999.99. There is also the XPS 13 which is targeted at mobile professionals and comes with a more-powerful fourth-generation Intel Core processor, Intel HD 4400 graphics and an improved battery. It has a 1920x1080 HD display and starts at $999.99.

Then there is the XPS 15 which is a multimedia machine with a 15.6-inch system, Quad HD+ (3200 x 1800) display with Intel's fourth-generation i5 and i7 quad-core processors with optional NVIDIA graphics cards. It's available with 500 GB and 1 TB hard disk drives, a 512 GB solid state drives and Intel's Rapid Start Technology. Pricing starts at $1,499.

Dell also unveiled its new Venue line of tablets, which we covered last week. There are two Windows 8.1-based products in 8 to 11-inche sizes and Android devices available with 7 and 8 inch screens. Intel’s latest Atom “Bay Trail” quad-core processors power the Windows 8.1-based Venue 8 Pro and Venue. Each of them starts at $299. The $499 Venue 11 Pro is based on Intel's fourth-generation Core i3 and i5 processors and comes with the option to use Intel's vPro management software. Both are have optional keyboards.

The Android-based Venue 7 and Venue 8 tablets are based on Intel's Atom "Clover Trail" Z2760 processors. The Venue 7 costs $149.99 and the Venue 8 costs $179.99.