If there was a capability of being able to receive ATIS I assume it would be via the Internet and require a 4G/5G connection to the device on which SD is working. It would be nice if it could be done and, probably, just be posted on the weather page.
It would be something that I probably would not use, as the speeds at which I travel in GA do not really require it, neither does my approach set up and execution.
Having said that, there are probably SD users out there who would benefit from it if they are flying more complex or performance limited aircraft. For the complex aircraft it is useful to know the runway and approach type in use so they can set up and prepare it in whichever navigation equipment they are using (think RNAV approach, where some prep and prior briefing is needed). For the performance-limited aircraft they may need to know the Runway Condition Report (dry, wet, contaminated etc) to ensure they have landing performance. Neither of these pieces of information are available on a METAR.
I suppose it boils down to just how many SD users would fall into those categories and I would imagine that number is very small and probably not worth Tim & Co adding it as a feature.
Nice gadget though and cheaper than ACARS.