Manyof the componentsin the automobilewouldbeeasilydetachabletosavetimeandenergyin the rarecase of repair, becausenoonewouldprofitbyservicingautomobilesoranyotherproducts.
Over time, though, lower average prices, more configuration options (such as tablets with integrated or detachable keyboards), and better (if not iPad-level) tablet app support, should set up Android tablets to narrow the gap.