Found this one particularly salient: 5. A lot of big names are in this game pro-actively, in case it actually turns out to be of some value. This is why you see big companies that should know better demoing embarrassing things (like LG's drunken robot). They need to be sure they have a foot in the door in case this actually takes off, but aren't willing to invest the funds needed to provide a serious, integrated system.
Many big companies are hedging their bets and playing catch up, which is downright dangerous when you're selling devices that scale up the threat vector for life-critical devices such as refrigerators, security cameras, door locks, thermostats, and cars.
I think Apple has the best shot at winning the connected home game due to their ownership of the iPhone ecosystem (used as a remote for the smarthome), tight product control, and their new marketing story of we are security - and they actually do implement the most rigorous key management and cryptography standards in the industry. I'm looking forward to their next hardware reveal - I think a Siri-integrated router (ala Amazon Echo) would complement their portfolio really well at the moment.