Oh, God no - in all honesty that new skin looks and feels utter rubbish. Piriform, please don't follow the herd mentality and actively promote the tasteless and useless stupidity that Microsoft has demonstrated with the Win 8 user interface.
CCleaner isn't an operating system, it's an extremely useful stand-alone application. Why on earth would you want to make it look like a user interface that has been bagged since Microsoft released that cosmetic disaster?