But then why most telecom committee members insist on wired LAN connectivity to every room ?

Problem:
Despite all the simplicity and ubiquity of Wireless LAN (Wifi), the technology implementation for consumer devices suffers from a few key disadvantages:

(1) Poor Real world Throughput

(2) Limited Range

(3) Random Instability

Real world throughput is effected by many factors such as interference with neighbors wifi network (remember this is unlicensed spectrum use and all wifi routers use the same spectrum which is actual carrier/pipe for data),  attenuation by walls and other devices, EM interference etc. battery powered mobile device less antenna power  [often fewer antennas(1), less gain ones (embedded), less transmit/receive power) to conserve battery life, but this has a very negative impact on throughput achievable per device.

Similarly the signal strength falls of as the distance between Wifi Router/AP and the client device increases. The hard concrete walls and household items offer tremendous resistance to the wifi signal  propogation and progressively weaken it as we move away from the router in any direction.

Wifi links are also not stable. Their is variable latency (jitter) in transfering data and sometimes links go up and down (when router switches channels)

The short buck story is you may not see more than 1/3th the speed rated in the best case with inconsistent results in time & space. This is diametrically opposite of what you see with Wired LANs.

Here is a third party illustration of the speed gap betweeen promise and real-world delivery:

Solution:

On the contrary, Wired LAN ports on switch and client device are rated as 1 Gigabit and they can do simultaneous 1 gigabit upload and download on each port at cable lengths less than 100m. Which means an 8 port switch capacity is actually 16 Gbps simultaneous throughput whereas wifi is limited to 150 mbps per router antenna in case of 802.11n or 450 mbps per router antenna in 802.11ac. Also this antenna level router bandwidth is shared between ALL clients and therefore the practical throughput seen by each client is way less and dependent on what other clients are doing (unlike wired ethernet). A bridge solution for high throughput is to use multiple access points which use wifi for short range and backhaul wifi signal over Wired LAN (especially useful for duplex penthouses and large 4 BHKs)

A certain kind of device in home today like PC, NAS, TV setop box need high bandwidth and this makes wifi unsuitable as carrier. Their is no fixed place where we can constrain these devices to be put in every home and therefore the committee members recommend that:

(1) Every Bedroom has atleast 1 LAN port for data and they all terminate in one switch area

(2) Living room TV location(and every TV location in Bedrooms/kitchen) has 1 LAN port

(3) Additional LAN ports maybe placed wherever deemed fit for other high bandwidth applications (like CCTV camera, additional TV points, wifi access points, etc) or for redundancy

This would give you sufficient flexibility to integrate multiple access points/routers and integrate high bandwidth devices in future. In essence this prepares you for any eventuality and gives you upgrade paths for future as your needs evolve.

- Suman Kumar Luthra @ APRC-P3 Telecom Sub-committee