You and your team may need more skills across more disciplines in bigger implementations but the good news is you won't be alone. The company, practitioners, and community are preparing to deal with an analytics-enabled and targeted, Contextual Web (again).
The VendorSDL itself has and continues to integrate its product lines. Though the claim to a "Comprehensive, Integrated Product Portfolio" might be hard to interpret in practical terms for implementers, see how this translates to the actual products in +Philipp Engel's presentation.
By Midas Rule, the product(s) will integrate. And no, those familiar-looking interfaces aren't becoming more like Tridion. SDL software is becoming more, well SDL.