I have one question regarding the statement:

"the cloud infrastructure cannot be more than 100km from the end device consuming the application, due to the finite speed of light, which can only traverse ~100km (round trip) in the 1 ms that is available for the networking portion ..."

Since light would traverse ~299km in 1ms, would the max distance of the cloud architecture be ~149.9km - assuming we do not take into account any additional processing and response times?

Edit: The author was using the speed of light in current-day fibre-optics as an estimation (~213km in 1ms, a reduction of about 30% from vacuum). Relevant - http://www.nature.com/nphoton/journal/v7/n4/full/nphoton.201...