Claire Irvin, editor-in-chief of Bauer Media's parenting portfolio which includes Mother & Baby magazine, said the Duchess is likely to remain grounded when shopping for baby paraphernalia.
"Kate's really supported the British high street. They'll carry on what they started. They do seem to like to give the impression of being very grounded," Irvin said.
With a nod to the youngster's environmental campaigner grandfather the Prince of Wales, William and Kate could inspire a "go green" trend in new parents across the country.
"We think she could spearhead a return to eco buys given Prince Charles' stance on the environment. Eco products took a bit of a hit with the recession when people wanted cost-effectiveness."
Kate will probably keep private whether she is breastfeeding because her choices are bound to encourage trends in styles of parenthood, she said.
"If they use a dummy, it will send sales of dummies through the roof and vice-versa if they don't."