If you had read further into the article (past the first two lines) you would have realised these latency issues are caused by hardware limitations rather than software. You can definitely bring latency down a decent amount in software, but as you approach 0ms the problems becomes exponentially more difficult. That's why this article is about Microsoft's pile of hardware prototypes, and how they're working on getting closer to 1ms in a table-like form factor.

The iPhone 5 just for context had a 55ms touch delay. The iPhone 6 actually increased that to 65ms (i.e. it got worse). Very few smartphones break the 50ms barrier (like one total from what I can tell).

That's what Microsoft are working on.