I dont see the need for one that large honestly. Then again I have a laptop to watch movies with.
I loaded my 8gig card with 500 NES roms, 40 SNES roms, and 40 GBA roms, about 400 mp3s and a few short movie clips and I still have 5gb left.
If i was going to use it to watch movies I would load 4 or 5, then connect to my laptop and swap them out.
I normally do that once a month with all the photos/videos i take.. Make a "Phone Backup" Folder and back it up all to the PC.
What's sad is in 6 months, that $140.00 card will be $69.99, and you will see a 64gb card for $140.00
Id rather just wait it out. The cycle for MicroSD memory is at its prime now, since its pretty much the universal format. Its best to buy when the "next big thing" comes out and the price drops almost in half. Its how the RAM market and Desktop Computer Parts markets have been for years now
I remember just 3 years ago seeing 256mb MicroSD cards for $70.00, now they are throwaways and worthless.