It's disappointing. Even guys like Durant and Harden, who have been dealing with injuries and also made a deep run in the playoffs, have committed for the US. I understand Jokic had an exhausting couple of seasons and doesn't want to risk that supermax contract (which would be the largest in NBA history) but there's not many opportunities to represent you country.
Bogdanovic looks in rough shape with the knee also and who knows how many more games Atlanta will play. I doubt he'll be anywhere close to 100% for the Olympics, if he even makes it that far.