Visual continuity is a determining factor to achieve the right transition between the kitchen and lounge. Using similar or complementary materials in both spaces will contribute towards creating a sense of fluidity, and the choice of cohesive colours and textures will reinforce their visual connection, making them feel as one.
Although the idea is to create a subtle transition, there are plenty of ways to visually define and demarcate each room in an understated manner. For example, the presence of different flooring, strategically placed rugs or changes in ceiling height can set boundaries that do not involve abrupt changes.
In this regard, a good option is to use the kitchen island to place a divider to mount the television which also serves to separate the spaces at the same time. Another alternative is to place the sofa facing away from the island, creating a natural corridor between the back of it and the front of the island.
In short, the key lies in striking a balance between the continuity and separation of the spaces, using the same materials and colours to create a harmonious look, and defining each space through a well-thought-out layout of the items and furniture.