Photos: 4G dual-core smartphones, ultrabooks and 3D printers at CES

Plus a quad-core tablet and a quartet of wi-fi cameras...

The annual Consumer Electronics Show (CES) is in full swing, with gadgets of all stripes being thrust in front of gizmo fans gathered in Las Vegas.

Among the shiny new kit being announced is this new smartphone from Nokia - its first Windows Phone device available in the US market. The Nokia Lumia 900, pictured above, closely resembles the Lumia 800 which launched in Europe but last year.

The Lumia 900 has a larger screen than its European sibling - 4.3-inches vs the 800's 3.7-inches - but packs the same 1.4GHz chip and 8-megapixel camera. The biggest difference between the Lumia 900 and the Lumia 800 is the addition of 4G mobile network technology - unlike the UK, LTE networks have already launched in the US.

Here's another 4G US smartphone on show at CES this week: the Motorola Droid Maxx has a 4.3-inch AMOLED screen and a 1.2GHz dual-core chip.

Similar to the Motorola Razr, the Android Gingerbread Droid Maxx offers a beefier battery.

Also popping its shiny head above the parapet this week is this Sony smartphone.

The Android Gingerbread-based Sony Xperia S, picture above, has a 4.3-inch screen, a 1.5GHz dual-core chip and a 12-megapixel camera. Unlike the Lumia 900, this smartphone is coming to the UK - slated to arrive in March.

Also on show is this as yet unreleased quad-core tablet from kit-maker Asus: the MeMo 370T - slated to carry a price-tag of $249.

But more prevalent than tablets at CES this year are so-called ultrabooks - a post-MacBook Air category of laptop that incorporate tablet-style features such as fast boot-up. Pictured above is the HP Envy 14 Spectre - an ultrabook with a 14-inch screen, a chiclet keyboard and a form factor that's a relatively slender 20mm-thick - but not as thin as kit-maker Acer's 2012 entry into the ultrabook category: the the Aspire S5.

Electronics giant Samsung has been shouting about its wi-fi cameras - adding wireless connectivity to four point and shoot models, the WB850F, WB150F, ST200F, and the DualView DV300F, with the aim of smoothing the process of getting digital photos where you want them.

Options offered by the wi-fi cameras include wirelessly saving to a PC, to Samsung's cloud storage site called AllShare Play and to Microsoft's SkyDrive. Photos can also be uploaded directly to various social services such as Facebook or emailed to contacts. The WB850F includes GPS for geotagging photos.

And finally 3D printers have also been extruding their stuff on CES's shiny stage this year. Pictured above is the MakerBot Replicator - a 3D print that does not require self-assembly and can print in not one but two colours - assuming you're willing to stump up the $1,999 for the model that comes with the dual-extruder attachment. The mono-colour version costs $1,799.

Another 3D printer on show this year: the Cube, pictured above, will cost $1,299.