LOL, this is hilarious. UA's widebodies are suddenly "old" clunkers? UA's widebodies are roughly the same age as CO's, with the newest widebodies delivered in 2002, which right up to when CO was taking 764s and 777s, excluding the last 2 they received. Not to mention you can't be the comfort of a widebody on ALL United international flights while the majority of CO's are flown on 757s.
The new F and C seats have been a HUGE success for UA and have won many accolades. 777 conversions still continue at the SFO MX base.