Only time will tell if apple will gut Aperture, but I tend to doubt this. In fact apple is busy adding features back into FCPX.
I'm more worried about apple's dedication to aperture, This was originally a pro app that is seemingly being pointed to consumer segment, but apple already has a consumer photo app - iPhoto.
I like Aperture, and I also like Lightroom, both have their strengths and weaknesses. Rumors are starting to swirl of an Aperture 4 coming out later this year. Wait for that to hit the streets and then see if it has the features you want/need.