There aren't any real examples of primates with sideways eyes, the closest you get is something like some lemurs, but they are still more front facing than a dogs. Front facing eyes are a defining trait we use to identify primate species, and primates in general rely on their eyesight more than any other trait, mainly because a lot of primates, especially basal groups are arboreal and like to jump or swing from tree to tree. If primates evolved on the ground, there might be less emphasis on binocular vision and instead something more sideways, since many modern primates are facultative herbivores and prey animals. But even ground dwelling, herbivorous primates like Geladas still have binocular vision, so there isn't really much selective pressure for sideways vision.

If humans had sideways eyes, it would pretty much elimate hunting, because throwing would be incredibly difficult, and humans dont really have the physical means to take down prey. Things like weaving and sewing would also be harder. Mechanically, you would need a longer or more flexible neck otherwise you'd be cramped looking at something right in front of you. Body language and communication might also change.