With almost universal use of GPS and INS I would think that before too long aeronautical navigation will switch to true (geographic) north for reference. No need for VORs to be 'tweaked' and runway designators to be periodically repainted. Ditto QFE, QNH and Standard Pressure Datum will disappear - all altimetry will be referenced to GPS sea level (with baro referenced back-up).
Last edited by Discorde; 28th November 2015 at 14:14.