Smartphones put writing on the wall for paid texts? I dont think so.

Quote: "SMS in the next few years will contribute less and less to non-voice revenue for operators," said Neha Dharia, a consumer telecoms analyst at Ovum.
Unquote.

So is this going to happen?

Yes if everyone just use their smartphone on wifi.

No if people still uses 3G or LTE for their smartphones where all these so call smart apps for text voice and IM needs to operate on. The telcos will be more than happy getting revenue from these 3G or LTE data connections.