any year SAP will deploy a new version of S/4 HANA. The next version withsome change in the area of EHS will come up soon. If you have the chane to visit SAP presentations you will get a good picture on roadmap in the area of EHS.
Considering the fact, that the “term used” are changing, it is important to understand the new terms as used with S/4 HANA: (In the past we have used e.g. EHS, EHSM etc.). But the situation will get “slightly” more complex (more terms).
Some discussions regarding the change of EHS with S/4 HANA can still be found. Here are some pages you should look at if you need information regarding S/4 HANA.
SAP will communicate per year the current future roadmap in context of “EHS applications” based on S/4 HANA to the customers (but only via direct contact with the customer or using some SAP presentations or partially via SAP marketplace).
You as “user” of SAP EHS Management should really try to follow any discussion in any user group (e.g. DSAG, ASUG etc.) to understand the SAP strategy. The changes (old world; new world) will be clearly bigger as the change from SAP 4.6. to SAP Enterprise, to SAP ERP; so this new “EHS” version will be a complete new software. But you (as Customer of SAP) need to think about: how to use the new version. UNtil 2025 you can still use SAP ERP in “compatibility mode) using an S/4 HANA environmetn (but you need to understand, thta S/4 HANA will not support all EHS tools (refer to different blogs)