Future proof a Desktop is impossible in my opinion and even worse for a laptop. At least you can upgrade a desktop from mobo,CPU and upwards. You don't state the value you wish to spend, numbers mean nothing unless you state what currency is involved, but go for a Core i7 Intel. 8 Gig ram and the best graphics card you can afford.
Sony Vaio Z Canvas release date, price and specs: Another Surface Pro rival but for the US