HTC Perfume rumored to bring Android 6.1 and Sense 8.0
The only bits of info are that the HTC O2 will launch with Android 6.1 and Sense 8.0, neither of which exist right now. HTC could certainly make the move to Sense 8.0 whenever, but given that Google just released Android 6.0 last month, we're unsure Android 6.1 will be on the way anytime soon. The very earliest we would expect another Android update would be Google I/O, which probably won't happen until June. So, if the rumor is true, it seems reasonable to not expect the HTC Perfume until the second half of 2016.
As far as anything else regarding the HTC Perfume (really really hope that's a codename) we'll have to take guesses. The HTC O2 was expected to feature a 6-inch 1440 x 2560 display, a Snapdragon 820 chipset, 4GB of RAM, 64GB/128GB of internal storage, a 20.7MP rear-facing camera, a 5MP front camera, and a 3500mAh. Aside from the display size, which could realistically be anywhere from 5 to 6-inches, all of that sounds pretty reasonable for any 2016 flagship. We'd also expect the usual HTC front-facing BoomSound speakers and probably a fingerprint scanner as well.