The only thing I can think of that would prevent it, is the way the shielding is done. The Abitana RJ45 sockets are designed to use the omni-media cable, so you may not get as good a connection for the shielding. Also some of the modules may not work as planned. Best way to find out is to see if you can get a sample of the Abitana cable and an RJ45 connector and some cat 7 cable.
Looking on the Minitran (Abitana's main distributer in the UK) the cable is the KP1003 rather than the KP1004. The main difference is that the 1003 only has 1 pair that can take the higher frequencies rather than the 1004 which can take the higher frequencies on all pairs it seems.
Personally the Omnimedia cable is OK and the way technology is moving, I don't think fitting CAT7 instead of the omnimedia cable will make you any more future proof. Mind you I am a bit biased as I am a certified Abitana installer
After all CAT5e will do gigabit ethernet.
The next leap in ethernet speed will probably mean fibre optic cabling. But the average home pc probably wouldn't be able to handle the data rate anyway, well not for the foreseeable future at least and at a reasonable cost.