One of the most important decisions a company can do, is to decide which markets they'll focus in and which they won't. This is even true for megacorps (see: Google and their parade of messups). There's just not enough time to be in all markets all at once.
So, again, it's not at all clear that AMD being in the compute GPU game is the automatic win for them in the future. There's plenty of companies that killed themselves trying to run after big profitable new fad markets (see: Nokia and Windows Phone, and many other cases).
So let's examine that - does AMD actually have a good shot of taking a significant chunk of market that will offset them not investing in some other market?