According to the FCC filing from late 2017, the machine would support 4K playback, include a voice-capable remote and run third-party Android apps. It's not certain if the device will change between then and its 2019 trial.
The hardware might be more important than it seems. DirecTV Now added just 49,000 new subscribers in the third quarter of the year versus 342,000 in the second quarter and nearly 300,000 a year earlier. AT&T chalked this up to both its $5 price increase and the end to recent promos, but that still suggests the early, headier days of growth are over. And AT&T knows it. During its earnings call, the company said it would take a more cautious approach to deals that shied away from the "low value, high churn" customers who jump from service to service. Now, it's focused on catering to those customers who are likely to stay for the long haul -- self-branded hardware could play a role in that strategy by making the experience relatively seamless.