Usually, 5th-round draft picks don't yield significant results. Only about 3-5% of players drafted in the 5th round are projected to reach the NHL. However, Obvintsev is seen by many scouts as having real NHL potential.
Teams often manage to secure standout goalkeepers late in the draft. Many of the NHL's top goalies today were drafted in later rounds. Take Igor Shesterkin, for instance—picked in the fourth round. Perhaps the Leafs have just found their future starting goalie in Obvintsev, if they're fortunate enough.