The kernel has been updated since the last available disk image. It is now 3.19.0-56 (after updating the system). I don't know about NVidia drivers since I have an AMD Radeon, but otherwise I have a new i7-6500U machine and it works totally fine with that config. I had a minor problem with the open source xorg drivers for the Radeon card, but that one could be solved by using the proprietary drivers that are included in the repositories. For newer NVidia graphics cards, there is a proprietary driver called "nvidia" which should also be included (you should be able to select it in the additional drivers tab in the update settings).
To test if 3D acceleration works, install mesa utils:
sudo apt-get install mesa-utils
glxinfo | grep rendering
In the latter case, you should see a window with moving cogs.
I'd say give it a shot :) You can update to a newer kernel afterwards if necessary, and with Ubuntu 16.04 coming soon, there should be a new version of elementary in the not too distant future anyway...
EDIT: The new Ubuntu 14.04 hardware enablement stack including kernel 4.4 is now available in freya 0.3.2 - just run the update manager