Looks like apps can resume instantly and apps can share with each other.

[colinkiama]

So looks like wp8.1 has been optimised for more ram... -->The New Windows Phone Application Model | Build 2014 | Channel 9

 

[Coolaaron88]

Im curious about whether they upped or removed the 15 apps background task limit in WP8.1.

 

[colinkiama]

Im curious about whether they upped or removed the 15 apps background task limit in WP8.1.

its the same for 512mb devices. For 1 gb ram its 30 and for 2gb ram its 60.