Computer gaming has some physical aspects apart from muscle memory and other non-conscious imprinted reflex responses.
Personal anecdote of the positive traits I gained from gaming:
Right hand: Improved short distance movement precision, index and middle finger mouse click speed is faster(thumb only slightly affected since I was a poor 3-button mouse owner in my early years)
Left hand: Button clicking speed which is quicker but less precise than the right hand's mouse clicking speed.
These are physical traits(muscle and nerve efficiency in the hands), it is not exclusively brain-wiring that fires neural impulses in a conditioned manner, there are real physical traits that has been trained on top of that.
My opinion on the whole E-Sports thing has much more to do with linguistics:
The S in Sports should not be capitalized, it is not a "Sport" of the type "e", it is a "sport" within "E"
IMO:
Main category: Sport
Sub category: Electronic
Result: E-Sport or e-Sport
Main category: Gaming(Interchange with "electronic" to get away from the reactionary cultural shaming of the term gaming)
Sub category: competitive(change to sport so it's not TL;DR TMS;DU for all the Americans)
Result: E-sport or e-sport