GREAT observation. I agree with Ape about the rolling droid not fitting in with Star Wars. But I also agree with you about the space scenes in Trek (and some of the first film) being done more like Star Wars than Star Trek. And that last statement about Trek being Scifi and Star Wars being Fantasy, that was true until Abrams made BOTH of them fantasy. . NuTrek does not pass for science fiction anymore.
I was speaking of Trek being Science Fiction not NuTrek
Really ALL of the scenes in NuTrek felt more like Star Wars. The pacing, visual cues (like bolts instead of beams) and everything felt Star Wars. Go back to Kirk on the ice planet in the 09 film - all that was missing was a TaunTaun and it would have fit into The Empire Strikes Back pretty well.
As to the rolling droid, I just thought back to the various shapes and forms of droids seen in (for example) the Jawa carrier in the original Star Wars and realized this little guy fits right in. Even better, it's a practical effect and an actual robot designed and built by Pinewood Studios.