Intel won't give you the time of day unless you're HP or Dell. That's optimal for capitalizing on old markets, but it means it's never in new markets. It always starts at a disadvantage. It's not that Intel never has chips startups want to use; it's that it's impossible to engineer with most of them.
By the time a product has enough marketshare for Intel to care, they need to displace an existing supplier.
This means they could never really diversify outside of PCs.