Laptops accounted for more than 35% of all PCs sold in retail stores last year, up from 29% in 2002 and 23% in 2001, NPD TechWorld said. Measured in dollar terms, consumer desktop and notebook sales are even. The usual technology trends – faster, cheaper and better – have made notebooks more attractive and affordable. Consumer notebooks carried an average price tag of $1,329 in the fourth quarter of last year, down from $1,672 three years earlier.