I use my iPad for facebook, twitter, instagram and slightly heavy games like Gta and real racing 3. Sometimes I experience crashes, and lags but i dont mind it I bought my iPad november last year and its almost 6 months old right now that time i know nothing about specs and everything like that. now the lags are getting worse. and the low res screen kinda irritates me. should i sell it right now immediately? to buy the new mini? is it worth it? or wait for this year's upgrade of the mini? touch id maybe? ios 8?