Samsung is not announcing SGS3 in MWC.

And I have no problems with the new HTC One designs. Prefer that they use polycarbonate and aluminium instead of Samsung's glossy plastic. And Sense looks much better than TouchWiz anyday.

Just want to quote TheVerge's on the HTC One S's design:

"The HTC One S is the best designed phone of the year so far. It measures just 7.6mm in thickness but feels even thinner thanks to its slanted sides and the way the front glass surface slopes off the edges. For a 4.3-inch phone, the One S feels remarkably light and easy to handle."

Source: theverge

HTC haters are always going to hate and say their phones look the same, but only because they neglect all the UI and material improvements and just look at the shape.

By ceramic, probably something similar to the ceramic metal they're using for the HTC One S.

Don't think so. Sense 4.0 is only for the HTC One phones.