The South Korean firm also promoted the head of its network equipment business, which analysts said got a lift from a US campaign to convince allies to bar Huawei from their networks.
Robotics have boomed in warehouses to speed up productivity and bring down costs.
The event, which runs from January 7-10, exhibits new technologies, including airlines, automakers, battery manufacturers and hundreds of tech start-ups.
Mara Group hopes a locally-produced smartphone, made in South Africa and Rwanda, will compete against the might of China's Tecno, which sells more handsets to Rwandans than any other company.
Bezos' statement comes off the back of controversy over whether internet giants who say they want to make the world better should be involved in the defence industry.
Google CEO Sundar Pichai will stay in his role and also become CEO of Alphabet Inc.
Uber self-driving test vehicle that struck and killed an Arizona woman in 2018 had software flaws, the National Transportation Safety Board said as it disclosed the company's autonomous test vehicles were involved in 37 crashes in 18 months.
Fitbit is a pioneer in wearable technology, but it's been shredded by the competition. The company's market capitalisation soared to just under $10 billion after becoming a public company in 2015.
Jody Williams, who is a Nobel Peace laureate, said lethal autonomous weapons are crossing a moral and ethical Rubicon and should not be allowed to exist and be used in combat or in any other way.
The social media company, co-founded by Dorsey, said the phone number associated with his account was compromised due to a security oversight by the mobile provider.
Turkish Science Minister Mustafa Varank says that AI technology is set to add $16 trillion to the global economy.
Investor anxiety has been fed by President Donald Trump's threat of new US tariff hikes on Chinese goods, protests in Hong Kong and weaker-than-expected data from India, Argentina and Singapore.
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