Future of IT industry.

With more than 2 decades of invention of PC, and complex systems built on various technologies, what holds in the future is it just maintaining the systems built so far or there can be deviation in terms of some more surprises in IT industry.

frankly speaking i think this huge legacy built up would reduce the speed of technological advances, are we going in a phase of very slow development and more of maintenance work, wherein we would again go in the factory mode of unskilled workers..........