Question: Senior management at my company are talking about possibly introducing hot desking\*, which might be introduced at the same time as an office move planned in a few months. The new location will be large enough to accommodate the company size; there will be enough desks for everyone, space is not a problem.

What problems does hot desking strive to solve, apart from not having enough desks?

Does it actually solve those problems?

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\*From [Wikipedia](https://en.wikipedia.org/wiki/Hot_desking): *"Hot desking is an office organization system which involves multiple workers using a single physical work station or surface during different time periods. The "desk" in the name refers to an office desk being shared by multiple office workers on different shifts as opposed to each staff member having their own personal desk."* 

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*Update*

Etiquette is: I select only one answer, but several answers here answer this question; there are several other excellent answers.

Answer: 
There is another case to consider, layoffs. This does not seem to be a problem at your company, as there are enough desks for employees. But consider one where 100% of desks are utilized and there is 20% spillover into conference rooms and such at times. A reduction in staff will be less noticed by existing employees as all desks are already over-allocated. 
This also helps by de-personalizing space. That desk is where "John" a loyal employee of 20years used to work. So no stigma associated with certain spaces(cursed desk), and no nostalgic remembrance.
I work in an office which uses hotdesks.

My office is a services company where most of the people will be working on client location. People comes to office when there is no project assigned to them or they have to work in non client work.

This works well, as the other scenario where each employee is assigned a fixed work place will cause huge waste of space.

The same company's office in another country where majority works from office doesn't have hot desk policy and is assigned a fixed desk.

TL;DR. It only works well for companies where a significant percentage of employees work remotely.