Apple does not benefit from increased competition or innovation. Competitive markets are bad for business. GPU chip making is also less profitable than their current markets. This is also why they don’t manufacture their products in house, device manufacturing is a much less profitable business than the product design and software services that they currently operate in.

Apple’s play is and always has been total design and control of the user experience. That’s their differentiator. They’ve no incentive to release a less profitable product, in a competitive market segment, that they can’t fully control, and which is less compatible with their software/services businesses. They will continue to cater to their demographic: people who want their wholistic designed experience and are willing to pay up to get it. That’s how they became the most valuable company.