I think the trend is nore lcd integration in gameplay on the playfield. Lcds getting cheaper and smaller and already being used on the pf in games like the hobbit and dialed in off the top of my head...and dare I say Alien and ft.
I like the idea of screens in the playfield, see through lcds as someone mentioned earlier would be great too.
As we have more competitors to stern out there now, I think cheap tech like lcd screens will start becoming more common.
That or a new high tech pin gulp :p