Well the ultrabooks dont quite excel in gaming and is just used for fast processing and boot time. The atom processors are not good and only good in types of tablets and mobile phones and thats why the ultrabooks generally bundle with the haswell U series processors consisting of the i5, i7 etc and they also dont have a dedicated gpu unless u go for the enthusiastic range(above 1000$) and hence these ultra lappys are good in the general usage and not for high graphical usage(gaming). As for the processors, the haswell series dont have the dual core i5 and the both processors will last long enough till you want an upgrade.