Commercially viable services delivered by the convergence of computers, communications and entertainment will take a long time to develop and depend on wide-ranging co-operation, says Alan Sugar, Amstrad Plc chairman, speaking at the launch of a wide array of consumer electronics products yesterday: A lot of moguls have got to make their minds up – it’s going to take another couple of years to get their heads together, he said; television set-top boxes could cost up to UKP1,000, a level that could deter consumers – someone’s got to pay for this equipment, he said.