Enter the Xperia Z1. New Snapdragon 800 SoC. New 20.7-megapixel Exmor RS camera. New aluminium body. In many respects, this is what Sony was aiming for with the original Xperia Z: a solid set of features to lure any smartphone buyer. It may be out a little later than your Galaxy S4 or HTC One, but there's no doubting that the Z1 is a high-end handset to take Sony into 2014.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips