And how do you think they came to "dominate" this ~$200/unit market? 2 words: "Contra" and "Revenue".
Sorry, I thought you were talking about Intel's "major business." If you think Chromebooks qualify as "major business" for Intel, I stand corrected. To me it read like you were talking about a business that Intel actually made money in.
If PCs include Chromebooks, then ARM is already invading Intel's PC business.