Fruits are now edible. You can pick them up, and they will appear in your inventory. You can also sell them (though I have not actually tested this yet).

Eating them may have an effect, and it may not. The effect may be good, or it may be bad. Fruit is a gamble...

The color and shapes of fruit should provide a consistent effect, so once you have eaten a round, orange fruit, you will know what all round, orange fruits do.

Most fruit should be static, behaving like fruit on earth. Fruit that interacts with you or other creatures should be rare. Static fruits will have the same effects as their moving counterparts, as long as the color and shape are the same.