Thanks for the interest in our work! The problem with looking at cell to this high resolution is that even small eukaryotes, such as yeasts are huge. Therefore, looking at mammalian cells (such as different cancer cells) would be a challenge. However, a group in Australia, lead by Brad Marsh are working on this next step in cellular imaging, looking at whole mammalian beta cells.
I'm not an accomplished biologist (first year into a chemistry w/pharmacy degree) but this looks really ... cool, for lack of a better word. Good luck with your research.