HTC could well be launching its first quad-core handsets after Nvidia confirmed Tegra 3 Quad-core smartphones will be unveiled at the MWC 2012 expo. in Barcelona.
This means we you might be seeing the HTC Zeta or HTC Edge, both of which have been rumoured to be using Tegra 3 quad-core processors.

HTC Zeta: Leaked pictures
According to The Verge, there will also be a quad-core offering from LG in the form of the LG X3 which, if released, would surely become their flagship handset.
While this is just speculation, it does at least mean that Nvidia will no doubt have prototypes of smartphones running their Tegra 3 Processor as already seen on the Asus Transformer Prime.
Source: Android Central