Tesco, a leading grocery/supermarket chain in the UK and elsewhere are canning VoIP, so reported the Register. The move is designed to bolster their value priced MVNO play in the mobile space that offers low cost, UK calling and is designed to be a cost cutting option for the cord cutters.
The move to shelve the Voice over IP telephony services, including Talk Wi-Fi comes at a time in the UK where wireless calling plans and deals continue to eviscerate the landline business market of many carriers. But the decision to take the products off the shelves and stop providing top-up credit is also an indication that people don't want to buy their basic phone service from the grocery, but they will top up a pre-paid phone there, so selling that service, with greater effort would seem to make sense.
In my mind this provides a big opportunity in the UK for Vonage to pick up the customer base that still wants a landline, or for the cable guys to move in fast.