If by "full version" you're referring to Photoshop CC 2014, there's now an option to increase the scale of the UI 200% (via Edit > Preferences > Experimental Features on the menu bar).
Thanks Warunicorn, I finally found this in the manual. It'd be nice if they had some information somewhere (other than the manual) on when this becomes "production" (taken out of "experimental"). I searched and searched for information, with nothing to be found. Hopefully now someone will find this :-)
The "experimental" options are brand-new to Photoshop CC. I think Julianne Kost announced it in one of her videos on the official Photoshop YouTube channel. Oddly, it's where I go to get the latest info. (One would think posting all the info on a Web page would be faster than producing a video but...that's neither here nor there, I guess.) xD