i saw few threads and felt like replying.. I got very little knowledge about it but will like to explain it and i am sorry if i guna point it out wrongly but will try my best to be accurate.
i read a thread abt cars , phones..... in fact they will not be in there... if u r dreaming to have bugatti then this is not what jannat means.
those things which r haram here will not be haram in janat. For man gold, silk, wine r haram ... but in janat we will find wine which wont be hard on mind and wont knock down instead it will give pleasure. Will be young forever, will have perfect woman, will have hoors as our helpers....
and the most important thing which will be there and which is not here is DIL KA SAKOON this will b on top which cant be get in this world.But the MOST MOST MOST important and happy movement will be seeing HAZUR PAK (s.a.w) subhanAllah and his companions InshaAllah. And ofcorz seeing Allah in JANNAT will end every best moment of anything or any imagination which we could imagine. Just imagine this and u will feel total different. Allah hum saab ko JANAT hasil karnay k kabil banahay AMEEn .
i hope i have helped a little.