The premature demise of Windows 8 on ARM, courtesy of Intel’s Medfield
Another possibility is that the customer will be told the reason their tablet doesn't run their legacy Windows apps or play nice with their network is because of the ARM processor. Neither MS nor the OEM will take the blame.
While almost no consumer knows their Smartphone uses an ARM processor they will learn the reason their WoA tablet doesn't work like they expected is because it has an ARM CPU. Ironically, for most consumers their first association with the ARM brand will be of failure.