I can't. Even though 4g finally has a decent resolution, the university I'm at relies heavily on flash technology and I rely on them since the past 4 years and will rely on them another 8 or more. Without flash I need a pc to set my exams, my courses, my shifts, everything.
Then there's the night shifts and the nice micro usb jack that can be found in every second room for charging

Then I like a decent camera for those little moments that make life worth remembering. Switching from 5 megapixels to 5 megapixels makes no sense for me.