Grammar is important- it's what binds words together, but it is not static. Nowadays, we live in a world of very fluid communication, so people are exposed to all sorts of varieties simultaneously, and this will have an impact on the langauge. Also, more and more non-native speakers are using it every day and they will also change things. The language isn't going to suffer from 'due to' appearing at the start of a sentence. Throughout the history of English things have changed and often dramtically. This is likely to increase in the coming years. I think there will be a greater simplification of the grammar to enable it to adapt to the globalised information society of today's requirements.