@Egika I am not sure if Strava patent applies to an entire activity. I know that Garmin does have a “ghost runner” feature where a person can race one of their previous activities.
But also, what I meant to say is that implementation of Strava live segments on Suunto already exists, although not a very good one. If combined with private segments, it can already be used to race your previous efforts. Although Strava live segments require a premium Strava subscription.