First of all, let me say I'm fine with TESV in Skyrim. I just wish they'd hurry up and announce it.
But second of all, let's assume that Skyrim is a healthy mix of Tundra, Taiga, and Temperate climates (snowy wasteland, snowy forest, and not-so-snowy forest. Let's say they even include the Temperate Rain forest climate found in some areas of the west coast of North America, which is indeed a very cool setting, especially for a video game.
While I'm not as opposed as Seti this kind of setting is all things that we have seen before, multiple times
Morrowind, it's expansions, and Oblivion all had temperate climates with occasional trips into snowy territory. So even if Skyrim is not ALL snowy...it's still something we've seen time and time again.
Give me a real rainforest. Give me the sandy desert of the Sahara, or the rocky desert of the Middlle East, with lush river valleys. Give me mountainous plateaus of scrub and stunted trees. There are a lot of ways to interpret a temperate climate. I'd love to see foggy boulder fields like in the Pacific Northwest, the rocky waterway of a fjord, giant pine forests. But we've seen very similar scenery already. While Skyrim could easily cover every temperate climate imaginable, it is hard to imagine it containing environments which are truly unique to TES, at least since the world was no longer procedurally generated.
So my question is this, would you really prefer Skyrim, as diverse as it can be, to some other province which in addition to a Temperate zones, has an area of equitorial climate rather than polar? We've seen the middle man, and most likely every game will have some version of a temperate climate, as that is the kind that covers the majority of our globe, and we've seen extremes in the colder regions. But we have yet to see vast deserts and tropical rainforests, both things that are unlikely if not impossible to have appear in a game set in Skyrim.