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Not really, other than limiting spread from someone who is potentially infected and making it harder for someone to touch their face (virus on hands getting into body via eyes/nose).

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N95 masks will also limit the spread from someone who is actually infected, too. So the masks will, when used correctly help limit all spread and I am not sure why you say "not really".

But I should add, the CDC only recommends face masks for the infected and limits recommendation of N95 respirators to healthcare providers and those in workplace settings.

People generally aren’t going to use them correctly, aren’t going to change them frequently enough, are likely to touch their face frequently if not used to the mask, and aren’t nearly as concerned about infecting others so much as protecting themselves.

Should you go buy some? Probably jot

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