I agree, but Exxon mobile would be BIG. Exxon had a profit the size of Amazon's for their lifetime in 2.5 weeks, this happens every 2.5 weeks.. http://www.reddit.com/r/Bitcoin/comments/2dsuhw/forget_amazon_paypal_or_ebay_somebody_should_get/
http://www.reddit.com/r/todayilearned/comments/2dnzo5/til_amazons_profits_for_its_entire_existence_are/
Well you are targeting a new industry. Their operating income was high in 2013,around $40 Billion and that of amazon was only around $700M that's not the important thing.http://www.reddit.com/r/todayilearned/comments/2dnzo5/til_amazons_profits_for_its_entire_existence_are/
The important thing is the customer base. People who use amazon should already be somewhat familar with basic computer knowledge and online payments. On the other hand you might find an old 'trucker' (no offence, just example) seeing the 'Bitcoin accepted here' sign on an Exxon gas station and he would probably be like
and just drive away. Don't get me wrong, it would be great if they accepted it too.