(Credit: Jimmy Yen's Blog (Traditional Chinese))
Click Here for a direct comparison for A77 Vs NEX-7 Vs the K-5.
It seems that the new 24M sensor of Sony has been able to maintain its Image Quality whilst packing more pixels (hence higher resolution) into the same APS-C size. Not bad. Hopefully and possibly this new sensor will be incorporated into upcoming new Pentax DSLR flagship, if any.
Related:-
K-5 Replacement Coming?
K-5 Replacement Coming? (Continued)