The simple answer is NO. 5G will not eliminate the need for cable broadband for high-speed internet. I theory, if Malaysia could install a complete 5G capable telecommunication tower all across the country then maybe the answer is yes. But the fact is, there still a lot of places in Malaysia that haven’t got 4G yet. (And FGV Prodata System is working very hard with MCMC in making it happens)
Enlarging the 5G network requires the installation of many more transmitters on telco towers, themselves connected to the fibre network, but each can cover many homes. However, just putting the infrastructure in place isn’t enough. To compete with cable broadband providers or to replace the cable network, 5G needs to support similar data rates. And the typical or practical data rate of mobile networks is much lower than their theoretical data rates.
So, although 5G theoretically supports up to 10 Gbps, its practical data rate can be as low as 200 Mbps. While this would still support typical internet use, it might not be suitable for heavy users who stream multiple simultaneous videos or play high-speed online games.
Another challenge for mobile networks is guaranteeing a reliable service for customers because their signals can be affected by several factors such as distance from the transmitter, obstacles and interference from other devices. This is a major concern for businesses and people who often work from home.
So, with all of these challenges in adopting 5G, it might not be possible to completely replace cable broadband with 5G broadband. Simply because heavy Internet users in major cities or businesses would definitely prefer cable broadband for a reliable, secure, high rate of data transfer. Unless wireless internet could stay reliable without interference, for now 5G will stay on mobile devices, mainly for ease of use.