At the moment the price of XEM is really pure speculation but that was no different from NEMstake from June 2014 to March 2015. .  I think NEM's mobile client is coming out in a week or weeks (...months?) but, as awesome it could end up being, I don't think it by itself will send XEM into the stratosphere..  because there's already some alts with mobile clients and it's not really a huge wow factor.