The new laptops come in three screen sizes: 13, 14 and 15 inch. They share similar specs apart from display resolutions.
http://www.notebookcheck.net/HP-unveils-new-ProBook-400-G3-laptops.150518.0.html
The HP US site currently has a press kit with specification PDFs.
http://www8.hp.com/us/en/hp-news/press-kit.html?id=2066871
Sadly, No FHD screen option listed on the 455. (HD vertical resolution is too low to display a full page of text well with room for toolbars, taskbars, etc.)
I still do not know why HP keeps releasing new probook series with only 1366x768 screen resolutions...
The probook 430 g3 series has no optional FULL HD resolution.
Lower resolution - longer battery life, I think. Not to mention that most users are quite happy with low resolutions.