Siri's Inventors Are Building a Radical New AI (2014)
wired.com
wired.com
The constant risk is a question of bias. If a system is connected to Apple 24/7, there is always the likelihood of a "promoted tweet" or some statistical variation thereof slightly biases a result towards a profitable outcome for Apple.
It's fantastic that such progress has been made in AI, but without complete transparency we risk falling into the same traps as have happened with other forms of proprietary software.
Most recent research is focused on neural nets and deep-learning to that end, this answers the question wrt prediction, but this seems to be a partial solution.