Private equity has a place at the table, and so do Oprah and Jay-Z. Food giants like Nestlé are scrambling to get a foot in the door. There are implications for the climate. There are even geopolitical rumblings.

The unlikely focus of this excitement is Oatly, producer of a milk substitute made from oats that can be poured on cereal or foamed for a cappuccino. Oatly, a Swedish company, will sell shares to the public for the first time this week in an offering that could value it at $US10 billion ($12.83 billion) and exemplify the changes in consumer preferences that are reshaping the food business.