I thought I'd add to this since it's the only smart TV thread on here. I guess the really annoying thing is using the remote for everything, including trying to "type" using a key selection and the
I had a USB keyboard (can't find it) but I do have several wireless USB mice with USB receivers. I'd tried plugging it into the USB port (primarily for adding USB storage, but I experimented and found it worked with a keyboard) on an old Blu-Ray player to be able to type things into search rather than peck through using the remote.
I plugged in the mouse into the USB port on my new TV and I was able to use it to navigate the web browser feature. It was painful to use with the arrow buttons on the remote. I'm pretty sure a keyboard would work, but when I tried to use a USB hub with my mouse it wouldn't work so something like separate keyboard and mouse with two receivers and a hub probably won't work.
However, the thing I'd really like to do is just type when I need to search in one of the apps, rather than hunting through the virtual keyboard. I'm thinking of getting a Logitech wireless keyboard/mouse combo (with a single receiver), although I'm not sure if it will work on the TV. No reason why it shouldn't. Not sure it's going to work with every app (I've heard somewhere it has to be enable by the app developer), but I guess if I want to use my new TV to browse the web it looks like that app will work with a mouse and keyboard.