Macs aren't a huge percent of Intel's processor business. It's a big enough percent that they would miss it, but Apple's desktop and portable market share is still small. And then there are servers.
True, but Apple releasing a truly desktop-class ARM into a MacBook might finally kick Qualcomm and PC laptop manufacturers into gear to releasing something that doesn't suck (like when Apple released a 64-bit ARM CPU and Qualcomm first made fun of it then quickly released their own)
This is true, however Apple are probably the single most visible sales channel for Intel processors in the eyes of consumers. I’d expect this to have a much bigger impact in the markets because of the publicity of the change more than anything else.