Your manager doesn't know what he is talking about. Any 25' certified high speed HDMi cable is capable of handling any HDMI signal currently possible. And it need not be expensive. Monoprice and Blue Jeans cables are two brands well regarded in the forums. Good performance is quite possible even at 50' at reduced bandwidth (sufficient for 1080p60).
The downsides of wireless solutions are that they use lossy compression are susceptible to interference. You may or may not notice a difference in picture quality. The best products, like Just Add Power's second generation products, claim to be "visually lossless". But IMHO it is usually better to go wired if you have a choice if for no other reason than it is much less susceptible to interference.