They're just prototypes at this point and number only three, but the trio of Boxster E convertibles Porsche has produced could be a sign of very good things to come from the company. Of course there's the 918 RSR and 918 Spyder, but the former of those two is intended only for the track and the latter only for the incredibly wealthy. An EV Boxster could be attainable by the only moderately wealthy, though of course Porsche's giving no indication of price for these yet.