By Kirk Hiner | for Technology Tell With the price of 7″ tablets now plumbing the sub-$200 level, should these entry-level units be considered disposable computing devices? ZNet’s Jason Perlow posed that question in a commentary last weekend, in which he relates an anecdote about his wife falling asleep in bed while using a Google Nexus 7 he’d recently passed on to her, dropping the tablet onto a tile floor, the impact of which shattered its glass screen. Perlow vetted out the cost of replacing the screen, discovering that ASUS charges about $170 to replace the digitizer/screen/glass assembly, and the parts for a DIY repair would cost about $140. The Nexus 7′s touch digitizer,...