The future is now, kinda
Remember that scene in Minority Report when Tom Cruise is on the run and he cuts through the subway station and his eyes are being scanned and 3-D advertisements are calling out to him with his name? There is a constant babble of intruding, realistic but lifeless voices babbling on about nothing. The next time you go to the Harris Teeter and you see that all the self checkout spots are being used go ahead and cruise through the middle of that section. Hearing the same voice from four different speakers pronouncing the same script at different points is more than a little weird.