A new front has opened up in the battle for dominance in AI chips, as Nvidia said its latest development could replace the mouse and keyboard in how people use computers. The $5tn £3.7tn US semiconductor company has launched a “superchip” that puts AI capabilities into laptops and desktop computers, a move that will pit it against Intel, Apple, Qualcomm and AMD. The RTX Spark chip will be launched this year, and will be used by computer makers including Dell, Lenovo, Asus and HP, paired with...