What does the neutralisation of acids and bases mean?
There are many theories put forward to explain acid-base reaction.
According to Arrhenius acid-base theory. All acid liberate protons (H+ ions) when dissolved in water. All bases liberate Hydroxyl ions (OH- ions) in water.
When the reaction takes place H+ and OH- combine to form water, and the remainder of the ions (what are left after liberating H+ and OH- ions) form what is called a salt.
In such reactions, Water is always formed.

What you have shown is an example of a Bronsted acid-base reaction.
Bronsted acids are proton donors (have ionisable hydrogen ion).
Bronsted bases have the capability to accept them (either via hydroxyl ion liberation or by their lone-pair as in NH3)

Clearly, the formation of water is not a necessity in a Bronsted acid-base reaction.