According to always well informed and close to Taiwanese sources DigiTimes, HTC is said to "likely drift away from Windows Phone (8)". Following last years global launches of the HTC 8X flagship Windows Phone 8 device and the HTC 8S mid-tier smartphone, HTC's global Windows Phone 8 market share is said to be under 5 % now, while Nokia now accounts of a market share of 80 %, and Samsung, which has also not put too much energy into Windows Phone 8, became the second largest Windows Phone 8 vendor. HTC, which is a long time supporter of different Microsoft mobile OS and smartphone platforms seems to definitely shifted its focus to Android.
While HTC had a number of (for Windows Phone) "successful" Windows Phone 7 smartphones available when Windows Phone was launched back in 2010, at the moment, HTC has only two Windows Phone 8s in the portfolio while Nokia has plenty different devices available. The biggest problem I see for HTC is the software and service development. It's not rocket science for HTC to put the Windows Phone 8 OS on reference hardware and designing a beautiful device around it. The problems are the economics of scale and the payback for the development around.
While Nokia did a fantastic job in the past two years, to enhance the Microsoft core platform, HTC hasn't put the same energy into the OS, the apps and the service around as it did with Android and HTC Sense. However, Windows Phone devices can only differentiate from each other by software enhancements since the reference design requirements narrows hardware differentiation but then again, it's a chicken/egg problem: no volume - no development / no development - no volume.
And in terms of global volumes, Android is looking more promising and HTC has to keep an eye on money and costs. Therefore, sources told DigiTimes, has HTC paid more attention to the development of Android phones aiming to slow down or stop the erosion of its share in the Android segment, especially after HTC was also kicked out from the top-5 Android phone vendor ranking recently.
All together it makes sense for HTC to "freeze" Windows Phone developments. However, I wouldn't expect that HTC is leaving the Windows Phone bandwagon, not as long as Peter Chou is leading HTC since Microsoft and Windows Mobile/Windows Phone made HTC what it is today: one of the better smartphone manufacturers in the world.
Whatever the future brings, HTC has yet not forgotten its current Windows Phone 8 devices and just recently announced the availability of Windows Phone 8 GDR2 - the latest "Service Pack" for Windows Pone 8.
Cheers ~ Arne