I doubt it. Lowrance had to dodge some Johnson Outdoors patents when designing their unit, and the separate unit has advantages. You can see the SS from multiple HDS units, and you don't have to buy a new LSS if your HDS fails or is stolen.

I believe you will see MORE functions moved to external boxes with communication over ethernet in the future. You'd mount monitors at the bow and console, and have a SS box, regular sonar box, GPS and maybe weather, music etc. mounted under the deck.