It is fair to say that we can often assume what features a new phone will have, but it is always good to have some evidence rather than just rumour before a device is announced.
The above is certification from the WiFi Alliance for Miracast technology for a HTC smartphone known under various SKU codes: PN07XXXXX/PN0713000/PN0720000/
Now we have no conclusive evidence that this is for the phone that HTC are set to announce on the 19th February, but bearing in mind the certification was granted on the 21st of this month, it is more than likely the case.
You can see the certification yourself on the link below: http://certifications.wi-fi.org/pdf_certificate.php?cid=WFA16349
We will of course find out for sure on the 19th whether the new product will have Miracast, but if it does and you would like to use this feature, you may benefit from the PTV300, details of which can be found here.