Technology would NOT have happened anyways. In 1934 an engineer at Bell Labs named Clarence Hickman created a machine that would answer phone calls and record a message on a magnetic tape. The first answering machine! It was large and clunky, but of course AT&T immediately saw the value of this device and started to work to put this highly profitable device in everyone's homes! Err... not. AT&T killed it because they saw no profit in the device. Worst of all perhaps, was the their suppression of the magnetic tape as a storage medium, which they perceived as directly in competition with their phone business. Why would people make calls, they thought, if they could record their voices and mail the tapes to each other. Magnetic tape recording wouldn't return to America until WWII, with German equipment.
That wasn't the only technology AT&T suppressed that could have changed our world, simply because the managers involved either couldn't see a profit in it, or felt it was directly competing with their own telephone service. Since AT&T had a monopoly on phone service, they kept anyone else from utilizing these inventions as well. Fiber optics, mobile telephones, digital subscriber lines (DSL), fax machines, speakerphones.. all developed or envisioned much earlier than you assume, and all suppressed as being dangers to AT&T's business model.
Those old modems where you put your phone set in acoustic cups? That was because AT&T owned your phone and would rip you apart in court for modifying or replacing their equipment. Even today they still drag their feet over letting equipment onto their networks, not because the hardware is risky (there are like 2 cellular radio chips, and every cell phone uses one of them but no you can't add an 'uncertified' phone to their network!) but because they are deathly afraid of disruption of their profits.
For every innovation that does break through, more are lost through endless litigation, buyouts and suppression. Businesses do not want to innovate, they don't want to create and R&D budgets have been steadily dropping. Businesses want to find a widget or an app that is indispensable, create a market around that with no exits or competition and then ride the profits for as long as possible.