When looking for my phone I thought the 4.3 inch screens were a bit too big, but that the 4 inch was about the perfect size.
At 4.5 inches are they going for a 'mini-tablet' size???
^^^I think your right. The phones basically are mini computers and geting better, stronger, faster(6 million dollar man voice). The Infuse seems to be a great phone spec wise and is right on par with the screen size of 4.3 phone companies are going towards. The 4" screen is the sweet spot and a great size but 4.3 will become the norm at some point..