We have a bunch of customers using MotiveWave on Android, Android tablets, iPhone, iPads, etc. by running it through our trading servers. Our servers have lag free remote desktop, so it feels like a native app without any delays. It's also a nice benefit to be able to access your entire trading setup over any device and on the go while away from your home computer.
Connecting multiple brokers/feeds within one Workspace is only in Pro and Ultimate -- that is correct. But in all of our other editions, you can still create a Workspace for each connection and have them open at the same time on the same computer (by opening another instance of MotiveWave on your same computer and selecting a different Workspace).
A mobile version is currently in development. We don't have a timeline yet as to when it will be available, but it is definitely coming.
If you use CQG, you can just use free CQG mobile for following/modify opened trades. Unfortunately, Rithmic doesn't support mobile version and I am doubt if MW mobile can support Rithmic connection. Anyway, any serious traders won't trade on mobile version of the SW. It's too small in screen size and limited in features. I think that's why Sierra Chart also doesn't have mobile version....