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4 big things to watch out for in tech this week

It's a big week in the technology space as some of the world' biggest companies prepare to release flagship products at the IFA consumer electronics show in Berlin, Germany's capital city.

In the lead up to the event which kicks off on Wednesday, a number of leaks and official announcements have already happened.

So this is what we are expecting so far:

Samsung's next smartwatch

Samsung unveiled its latest smartwatch on Monday as it looks to take on its U.S. rival Apple in the wearable space.

The Gear S2 is the South Korean electronic giant's seventh smartwatch but the first one with a round-face. It runs on Samsung's own Tizen operating system rather than Google's Android Wear.

Read MoreSamsung launches smartwatch in Apple fightback

Other features include near field communication (NFC) technology, a heart rate tracker, and the ability to use 3G to carry out a number of functions without having the watch tethered to a smartphone, unlike many of its competitors.

Samsung has held back on the price and availability of the Gear S2, but has a press conference scheduled at the IFA consumer electronics show in Berlin on Thursday where it is expected to give more details.

World's first 4K smartphone?

A Facebook page for Sony Georgia – which the Japanese electronics giant later said was fake – released details and images of the company's upcoming smartphones.

Sony is set to release three smartphones at the IFA on Wednesday. The Xperia Z5 series will include a "Premium" device that will have a 4K screen, potentially the world's first. 4K refers to the screen resolution and is sharper than ultra-high definition.

There were no details of pricing or availability on the leaked post, but more details are set to follow at IFA this week. Sony has been struggling in the smartphone market but is hoping to focus on profitability rather than shifting high volumes of devices, the company said earlier this year.

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Next-gen TVs

IFA is also expected to feature the TVs that may grace homes over the next few years. One of the big announcements has come from LG which will be showing off what it is billing as the world's first "HDR capable 4K OLED TV" at the consumer electronics show in Berlin.

HDR stands for high-dynamic range. A HDR image provides a higher level of contrast between light and dark colours, making the whites whiter to create a more realistic picture. 4K refers to the resolution of the TV and is above ultra-high definition.

More smartwatches

As well as Samsung's Gear S2, rivals are expected to be coming out with their own new wearables.

According to leaks on Twitter, Motorola could unveil some new models of its Moto 360 smartwatch. China's Huawei is also expected to give more details about its smartwatch, a device it announced at Mobile World Congress earlier this year.