Looking into the future, what would be the logical step in microscope

[NeedtoKnow1]

developement & what would that open up? Looking to the future of microscope developement, what would be the logical next step & what secrets of science would that new technology open up to scientist?

 

[random]

The next breakthrough would probably be the capabilities of an electron microscope on living tissues. Right now there is a process that kills the specimen when looking through an electron microscope.