Non-intrusive technology which can work at home to monitor people' vitals is a game changer, there are so many applications to this. Research is at the beginning.
Indeed there are privacy issues with big providers doing this, but then this really opens up so many possibilities if done well.
And if they offer you enough money to acquire the company, you'll take it, because if not you then someone else will do it. Humanity is not in fact crying out for a better panopticon.
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Radar technology isn't some kind of forbidden magic. Can you do radar sensing with 2.4GHz? Yes, absolutely. Now, can you do it well, with an off-the-shelf Wi-Fi chipset, and get down to heartbeat monitoring? Only if the chipset was designed for it. Very few existing chipsets are. Still a new experimental thing.
For practical applications today, I would look instead at things like dedicated mmWave 24GHz radar chips instead - they're getting cheap now. For the future? If chip vendors that ship the usual 2.4GHz/5GHz MIMO router chipsets start putting the relevant features in, the idea would be worth visiting.