Much needed platform for IOT is in market now AWS IOT, though its in BETA but looks very much promising. Some of the very concerns regarding IOT developments are covered effectively. IOT is very niche market with very few players competing, mostly they are all home automation based.
Problems faced are mostly covered, but as market grows amazon has to adapt quickly.
Issues like security for devices which mostly deal with serial data is some how handled with certificates. Lower network connectivity for small devices and offline state maintenance dealt effectively with shadow devices, and last but not the least, managing rules based on states, and transform message accordingly, so that different devices having different structural messages can communicate smoothly.
Future of IOT looks more promising with amazon providing such robust platform.