If you haven't yet read up on Project Tango, you should.
This technology will enable 3D scanning of indoor environments with your cell phone or better yet, Google Glass, in the very near future.
Imagine a world where you put on your Google Glasses and its Apps suggest furniture that fits the space and thereafter places visuals of the furniture before your eyes.
Will you need an interior designer in the future?
As we always say to real estate brokers at our School, we are out of the days when you could simply match clients to earn money as a professional and we are now part of a value-add industry.
Perhaps, you will still need an interior designer in the future, but their job will have a different purpose.
Only the future can tell.