Let's put things into perspective. What this discovery means is that rocks/celestial objects no matter how big (from meteors to planet size), are capable of carrying and producing biochemistry building materials through organic non-biochemistry process. (non-earth-biochemistry anyway), as long as they are in the right place (distance from a sun/star/heat source, so it won't froze, or too hot) with right raw materials. (covered in - organic, simple molecular). And the next step into real biochemistry, is that for some reason (probably due to frozen events) only some of these organic materials evolved in some way (not clear how) into biochemical process and building lives on Earth.
And if this is true in our solar system, then the process of organic non-biochemistry process is also likely happens in other solar system in space on small celestial objects (probably still happening right now in our own solar system), rather than limited on a right place, right composition planet-size celestial objects in some distant past. So it increases the chance of the the next step biochemical process to happen. We used to think these process has to happened on a planetary sized planet like what happened on Earth and within Earth. Now we know the entire solar system is a giant factory for manufacturing components. So YES, it did increase hope for more extraterrestrial lives other than our own. (And even life happens in space, at least in asteroid-size one.)
A planet may be too hot when it was just formed, and gradually cooling or moving into suitable living condition, and with constant asteroids seeding components on a planet, these carriers from space will greatly shorten the "waiting time" for life to appear and increase the chance of life to evolve (before a planet becomes too cold, which Earth probably will be without life). But this still falls into the second step which we don't truly know much. So how long it may take from organic-biochemical components evolve into biological lives is still unknown. We know it took Earth less than 1 billion year (considerably less if you only count from when condition is suitable for life on Earth), whether we are lucky(or unlucky) in this process is yet to know.