Paul Genge of Sony UK confirmed that the A77 will not have a flip-up mode to allow shooting without this extra sheet of glass in place.
http://www.photoclubalpha.com/2010/09/21/sony-affirms-nex-future-and-slt-path-for-alpha/
So the ghosting issue won’t be fixed, nor we get better high-ISO.
:(
Thanks Sky for sending me the link!
P.S:: The ghosting issue has been described here: http://www.dpreview.com/news/1009/10090705sonya55reviewupdate.asp