I plan on getting a Surface for when I head off for university in ~2 years. At that point, will the Surface Pro 3 (currently ~$900, will drop in price when I plan on getting it) still be usable ("usable" meaning not obsolete/missing newer important features) for the next 4-6 years after I purchase it as my main computer, or will I be better off dumping ~$1500 into whatever model is the latest at the time? Will mostly be used for note-taking, pixel art, web browsing, and light gaming (think GraalOnline, Clicker Heroes).