I agree, those are definitely some of the big challenges facing law firms over the next 10 years. I would say whether you can use your skills and experiences to assist the profession depends on the challenge. For example, let's take alternative billing models, that's more of an issue for partners and so probably not something you could assist with.
Cyber security, on the other hand, is much more relevant to a trainee. You will often be handling confidential client information and you will need to follow the guidance from your law firm to ensure that information is protected. That may involve regularly changing your password, locking your computer when you leave and reporting spam emails at your work address. Here, you could mention any past experiences where you have had to protect personal data. You may also mention your IT skills, attention to detail and strong communication skills (but if this is an application question, talk about examples when you have used these skills rather than simply stating them).
The same applies to legal technology. Do you stay up to date with legal technology news (Jonty has some great articles over at the
Law Tech Academy)? Are you creative? Entrepreneurial? Do you have any experiences working with other types of technology, both in and outside the workplace?
Both of these are just examples, but hopefully it gives you an idea of what to look out for!