Tablets, smartphones and PCs

Intel will promote Windows two-in-ones as alternatives to tablets that do not use its chips

Many smartphone and tablet-makers are holding back announcements until February's Mobile World Congress or their own standalone shows.

But three Asian firms have confirmed they will have new products on show:

• ZTE has promised to take the wraps off the Grand S2 handset, which it says will feature "intelligent voice controls"
• Lenovo has already teased images of the S930, a new 6in phablet
• And a video teaser from Asus suggests it has at least three new handsets

Intel will want to highlight the release of new Windows laptops that double up as tablets after championing the two-in-one format at previous CES shows.

In addition, Time Magazine has reported that PC Plus will launch at the event - a class of devices powered by Windows 8.1 that can run some Android apps through software emulation.

There will also be more PCs powered by Google's Chrome OS.

Connected home

The Smart Diet Scale links up to online nutrition guides to tell you about your food

New ways to link household objects to the net has been a hardy perennial of recent CES shows.

A Twitter-equipped fridge from Samsung was one of last year's more extreme examples.

This time Kolibree's connected toothbrush - which provides feedback on cleaning habits via an app - may prove one of the most unusual launches. The firm says it will tell users if they brush long enough and whether they clean the hardest-to-reach parts of their teeth and gums.

Okidokeys will be the latest firm to offer a way to unlock your front door with a mobile phone, with the added twist that you can revoke someone else's access privileges remotely.

And to avoid the frustration of missed deliveries, DoorBot will show off a "video doorbell" that lets you see and speak to someone waiting on your doorstep via an app, letting you tell them where to leave the parcel when you're out.

Not tasty enough?

Then try the Smart Diet Scale - a Bluetooth-enabled kitchen gadget that weighs your food before you cook it, and sends the information to an app that calculates the calories, carbs and fat involved.