> A "tech company" is one where your tech is so good that either you can offer differentiated consumer experiences that nobody else can offer(…) or people pay you to handle the tech things for them

It’s a decent definition. It has some implications though

Almost no companies really differentiate via tech that nobody else can offer

Almost no game or app companies meet that bar. Most game companies have tech that another company can reproduce for example. Almost all apps use fairly commonplace tech.