64bit iOS

Everyone on this board seems so pumped about iOS being 64bit.

Can somebody explain what is so exciting about this? 64bit allows for >4gb of RAM to be accessed and used. Last I checked, RAM isn't customizable in a phone, and is limited to what Apple placed within the phone (likely 1gb or 2gb, both which can be handled by a 32bit OS)

So what is the point? All I am seeing is unnecessary fragmentation, now there will be 32 and 64bit apps.

Apple didn't even give any benefits, other than patting themselves on the back and being able to say "its twice as many bits so twice as good!"