I see more and more investments pouring in to business/enterprise SaaS. Analytics, whilst not normally considered SaaS, is certainly strong in the mindset of investors and when companies start understanding how they can use their analytics data, they will see fantastic returns. At the moment, it seems that only small business ~<$10m really understand true analytics or conversion optimisation.
Data Science startups/apps are an extension of this and my money would be on them if they can easily show ROI to their clients.