Upgrade requires a previous version, which if you have it, great. No of course Ultimate isn't worth it, why would it be? Almost twice the price for what? Business features that you won't use. Of course if you do use them then by all means, or if you want a full language pack, or perhaps Windows will switch the versions a bit (nothing confirmed here afaik), but in all likelyhood no Ultimate is not even close to "worth it."