Not Iptv directly but the majority of the US channels stream from Playstation Vue obviously this is going to have a huge impact on the US content you can watch.
Unless IPTV providers can find reliable high-quality alternatives I think it may well cause major issues for the future of IPTV,personally I recommend if you watch US content do not buy any more than 1 month for the foreseeable future.
https://www.reddit.com/r/Vue/comments/dotar5/playstation_vue_is_shutting_down_january_30_2020/
There's still fubo, Hulu's Live TV, sling and a few others that wouldn't be hard to do what they're doing with now... so I'm sure it'll cause a hiccup but not the end of the world just a bit more effort.