LAS VEGAS -- Looking at the Portege Z20t two-in-one, shown here at the 2015 International CES, it's almost like Toshiba threw out everything from its predecessor, the Z10t , and started afresh.

It's still a tablet paired with a detachable keyboard, but it's grown from an 11.6-inch display to a 12.5-incher. It's a full-HD IPS panel with a Wacom digitizer with 2,048 points of sensitivity. A small stylus is stowed in the tablet body, but a larger pen is included, too.

A change to an Intel Core M processor has eliminated the need for unsightly vents on back, but it's still powerful with 8GB of memory and a choice of 128GB, 256GB or 512GB solid-state drive. Also inside are 802.11ac Wi-Fi and Bluetooth 4.0 connectivity. Around the outside of the tablet are Micro-USB and Micro-HDMI ports and a microSD card slot.

The new keyboard dock attaches cleanly across the entire side of the tablet, so the unit looks and feels more like a laptop when attached. And you can angle the screen back, which gives you better flexibility when using it on your lap and it angles the back of the keyboard up for more comfortable typing. The tablet can be attached away from the keys, too, so it works more like a stand.

Adding to the laptop-like performance, the keyboard dock has full-size RGB and HDMI outputs, Gigabit Ethernet and two USB 3.0 ports. It also has its own battery this time around, which combines with the tablet's 9-hour battery life to deliver up to 17.5 hours of life.

The Toshiba Portege Z20t 2-in-1 ultrabook will be available in January starting at $1,400. Pricing and availability wasn't announced for the UK and Australia, but the starting price converts to roughly £915 and AU$1,730. See all CNET's CES 2015 coverage here.