Samsung is having an Unpacked event at New York today (11pm Singapore time) for the Samsung Galaxy S8. You can catch the live stream on Samsung website.
The announcement is slightly later than usual. We usually get the announcement at Mobile World Congress around late February or early March. Samsung delayed the announcement following the investigation into the Note 7 fire.
Samsung has since introduced a 8-Point Battery Safety Check for its smartphones. The Samsung Galaxy S8 is the first major smartphone launch since Note 7.