I started out early in my career delivering office supplies, installing furniture, and then venturing into sales, so I have been in many offices. I would often wonder why people held on to furniture for twenty to forty years! I understand the mentality , 'If it is still usable then why would I get rid of it.' But... when your chairs fabric is faded and worn and your desk is chipped and has a light oak finish or a beautiful lime color that resembles furniture from the 1970's, then i am not judging ... but kindly recommending.... it may be time to let go.
Furniture to me, makes long lasting first impressions. One can compare the same concept to what you would wear to a job interview or a first date. What you "wear" is a direct reflection of who you are and the business you offer.
I am not saying you need a "Cadillac" for a desk. There are plenty reasonably priced office casegoods and seating that would not only give you that revitalized look, but also create long lasting impression.
Here is a little food for thought........Who would you do business with?