There are a lot of devices which are a result of technical convergence:
* Voip(Voice over Internet Protocol) you can use the softphone to communicate to any landline or mobile after purchasing a DID(Direct Inward Number) which works with the SIP(Session Intiation Protocol)
* Telecommunication(transforming from 2G==>2.5G==>3G==>3.5G==>4G and on)
* Replacing super computer which can perform a number of task with the virtualization environment using vmware (for windows) or proxmox (for Linux)
*Space shuttle can also be considered as a technological convergence.
* automation in the industry level using CNC machines which expanded the business and removed the manual efforts.