Most of the time, you tend to sit infront of your computer and a wired keyboard is more than sufficient in that case. Even if you want to relax on bed and work on your desktop, the desktop screen would become too small to be readable.
Another side effect is wireless keyboard tend to slip from your keyboard desk and may broken if it happens more number of times.
So what I suggest is keep the wired keyboard for your desktop which is cheaper and confirtable. However, make sure you do not choose cheaper alternatives and always go for the best brands such as Logitech, Microsoft etc.