(Huffpost) Jawbone is dead – as a consumer producer of gadgets anyway – and questions have to be asked about Misfit, which looks worryingly lifeless as we await the delayed Misfit Vapor sports smartwatch nearly a year after its unveiling. And then there’s Fitbit. The company is openly pessimistic about fitness tracker sales, and has gone all-in on its impending Fitbit smartwatch. On the horizon are a host of sensors that could totally reinvigorate the market – the problem is that few are ready here and now. Fitbit has talked about new features that could tackle conditions such as sleep apnea, hypertension and arrhythmia. Blood oxygen, blood sugar and hydration are the subject of serious investment from brands like Samsung, which has a stake in the recently-delayed LVL hydration-tracking wearable.