Hah, very good topic!!
Unfortunately the users of V4 are in a serious dilemma regarding this issue. Hardware and operating systems are constantly developing but V4 somehow doesn’t seem to move along.
If you buy a new laptop today, it very likely comes with Windows 8.1.
If it shouldn’t be too heavy and have decent batterylife along with graphics power, you will likely have Optimus built in.
And if you are willing to spend good money on the machine, it will also very likely have a high DPI display.
Allmost all top of the line machines are equipped like this, which is cool.
Now the bad news:
the current beta version of V4 is (still) not compatible with Windows 8.1. If you don’t like to wait for a beta release or if you need to jump between different V4 versions for some reason, you will probably need to stick with Windows 7 forever.(Note: many new laptops don’t fully support legacy OS’s due to a lack of drivers)
no version of V4 is currently compatible with NVidia Optimus + Windows 8.1. Windows 7 + Optimus seems mostly ok.
no version of V4 is currently usable with high DPI displays, unless you just set the display resolution to “normal” value.
This means, if you want a good laptop for V4, don’t go too excited with modern hardware features or contemporary operating systems.