Oz, that's all fine and dandy being dazzled by lights, bells and whistles, but there will always be a need for the basic PET. Money is King. It is like telling your chldren we don't need Trades people in society because we're all going to achieve Doctorates. The plumber who comes to unplug your toilet can be the most imprtant person in your life at the time.
Don't go into a trance because POET is talking about VCSEL's for the Data Centers which include optics. The fluff of speed is no longer talked about because "money and cost" is what drives orders. You can bet anyone fulfilling orders would like a 2nd lower cost option. That is why the buttons on your dress shirts manufactured in Asia don't stay attached for more than 2 wash cycles. Saving $0.0001 on thread.