Hmmm, GT Sport. We're all waiting, right?
There is a new PlayStation 4K on the near horizon. It is probably called PS 4K for an obvious reason, plus the GPU will also support the PS VR headset better, so it seems developers, including PDI, are starting to program directly for the higher quality graphic abilities, plus the CPU is also supposed to be much faster. If you want to play GT Sport and GT 7+ on the PS4 with either the VR or in 4K, then you probably will want to get the noticeably smaller PS 4K. The suggestion based on everything that I have read, so far, is that the original PS 4 may not quite be able to handle them all that well.
All of this costs money, but if you can dump your current PS4, it will help to recover some of the new costs.