As with most technologies, I don't think that the "new" internet/computer technologies will replace the television any time soon. After all, records, tapes, and CDs didn't replace the radio, and neither did the TV. And, importantly, none of the above have replaced physical or electronic books (I hope that never becomes the case)!
Some technologies that WERE replaced (or nearly completely replaced) in recent decades by newer technology: LED-screen calculators, laser discs, 8-track tapes, Super 8s, manually lit stoves and furnaces (electronic ignition is the current way), manually winding watches, carpet beaters (by vacuum cleaners), stoves and microwave ovens live happily together now, etc. One on the way out: incandescent lightbulbs, in favor of compact fluorescents which in turn are being replaced almost immediately by the brighter and more earth-friendy and safe LED bulbs.
Rarely does a technology replace, completely, its predecessor. Over time, they settle into a general relationship that works for each person (cooking in the microwave versus on the stove, for example, is a personal choice). One that has totally replaced another, however, (with the exception of the Amish) is the replacement of horse-and-buggy travel with car/truck/bicycle/ motorcycle/other vehicle travel.
Cordless products are also replacing their corded siblings as battery technology, in terms of strength, size, weight, and especially power output and longevity, improves. Soon they will have not only kinetic (arm movement-winding) watches but ones that can recharge from the tiny amounts of electricity in your skin.