## 10 Conclusions  
With the development of 5G, networks were highly defined by the services they offer rather than the underlying technologies. When it comes to 6G, the definition of the network is further attached to a broader set of services and requirements. Hence, underlying technologies such as cellular networks do not set the boundaries of the 6G ecosystem. The latest 6G networks span across indoor/outdoor spaces, deep sea, and space. Therefore, the 6G ecosystem is inherently heterogeneous and consists of number of communication technologies, in addition to cellular networks.  
Providing multi-Gbps access in the indoor spaces is something that cellular networks have always struggled with, due to numerous reasons such as propagation loss and absorption. The WLANs so far have also not provided a reliable connectivity that the user applications require. Hence, merging the WLANs with 5G or previous generations was not an effective solution.  
Nevertheless, the recent developments in WLANs, such as WiFi, VLC, and OWC enable the use of WLANs in the 6G ecosystem to support indoor user applications. In par ticular, WiFi introduces guaranteed access and low-latency communication through changes in the MAC layer. Furthermore, the extension of the frequency band to the 6 GHz range provides a significant amount of bandwidth for upcoming WiFi networks. Therefore, WiFi networks are becoming suitable candidates to provide ubiquitous connectivity with guaranteed QoS. Devices ranging from laptops and mobile phones to IoT sensor nodes will benefited from these novel features of WiFi. On the other hand, VLC and OWC networks are still in the early stages of their developments. Yet, the massive bandwidth available in the optical range has enabled them to operate at multi-Gbps rates with simple transceiver designs. Hence, these networks could provide the multi-Gbps links required by the AR/VR and 8k/16k video streaming devices. Furthermore, the directionality of the optical links allows for the reuse of wavelengths and increases the security of the links. It can be seen that each of these upcoming WLANs has their own strengths and weaknesses, which takes the heterogeneous approach as the best way forward for 6G deployments in indoor spaces.  
In this paper, first, we discussed the requirements of the upcoming user applications in the indoor spaces. Next, we presented the novel features of the latest WLAN technologies and critically evaluated the strengths and weaknesses of each technology. We discussed the suitability of integrating these emerging WLANs in the 6G ecosystem, identifying the major challenges that need to be overcome. The review and analysis presented in this paper provide insights into the future directions for the development in WLANs aiming to support the 6G ecosystem.  
Individual contributions of authors to the work presented in the paper are as follows. Conceptualization, methodology, formal analysis, resources, data curation, writing--original draft preparation were performed by [PERSON], [PERSON], [PERSON] and C.R. Writing--review and editing was performed by [PERSON], [PERSON] and C.R. Supervision and project administration were performed by [PERSON] and C.R. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding  
The authors declare no conflict of interest.