The latest Virtex-7 FPGAs have something like 20 times the computing power of the biggest FPGA supported by LabVIEW FPGA; it would be cool to be able to get those on a FlexRIO card.
Other companies make FPGA boards with up to 32 GB of RAM, the biggest FlexRIO has 512 MB; would be cool to have FlexRIO cards with RAM in the gigabytes.